Nokia BTS2500E User Manual

Section 8 FCC ID: PHX-BTS2500E
Users Manual IC: 4022A-BTS2500E

Section 8

Users Manual

NextNet Wireless, Inc.
9555 James Ave. South Suite 270
Bloomington, MN 55431 Page 8-1 of 127 5/4/2006

®

Configuring, Installing, and
Using Carrier Infrastructure

Broadband Wireless Access System

Part Number: 104-0300-0004-01

i

BaseConnect, Expedience, NetProvision, and ProvisionLink are trademarks of NextNet Wireless, Inc.
©2000-2006 NextNet Wireless, Inc. All rights reserved. Revision 4_3_B

WARNING: This equipment has been tested with a 19 dBi gain antenna and found to comply with FCC and

Industry Canada guidelines for Radio Frequency Radiation Exposure Limits as detailed below. For a single
base 5 watt transmitter connected to the antenna, a minimum of 2 meters or 6.5 feet of separation between
the antenna and all persons must be maintained. The minimum separation increases when additional base
transmitting signals are combined and applied to the same antenna. Four base 5 watt transmitters combined
to use a single antenna need a minimum separation of 4 meters or 13 feet from all persons.

Radio Frequency Radiation Exposure Limits.

TABLE 1. Limits for Maximum Permissible Exposure (MPE)

Frequency range
(MHz)

0.3-3.0 614 1.63 *(100) 6

3.0-30 1842/f 4.89/f

30-300 61.4 0.163 1.0 6

300-1500 — — f/300 6

1500-100,000 — — 5 6

0.3-1.34 614 1.63 *(100) 30

1.34-30 824/f 2.19/f

30-300 27.5 0.073 .2 30

300-1500 — — f/1500 30

1500-100,000 — — 1.0 30

Electric field­strength (V/m)

(A) Limits for Occupational/Controlled Exposures

(B) Limits for General Population/Uncontrolled Exposure

Magnetic field­strength (A/m)

Power density
(mW/cm 2)

2

*(900/f

)

2

)

*(180/f

Averaging time
(minutes)

6

30

f = frequency in MHz
* = Plane-wave equivalent power density

NOTE 1 TO TABLE 1: Occupational/controlled limits apply in situations in which persons are exposed as a
consequence of their employment provided those persons are fully aware of the potential for exposure and can
exercise control over their exposure.

Limits for occupational/controlled exposure also apply in situations when an individual is transient through a
location where occupational/controlled limits apply provided he or she is made aware of the potential for
exposure.

NOTE 2 TO TABLE 1: General population/uncontrolled exposures apply in situations in which the general
public may be exposed, or in which persons that are exposed as a consequence of their employment may not
be fully aware of the potential for exposure or can not exercise control over their exposure.

Note: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio-frequency energy, and, if not installed and used in accordance with the installation
manual, may cause harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case users will be required to correct the interference at
their own expense.

This Class A digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

ii

TABLE 2. Technical Information

Transmitting power .001 watts to 2 watts

.001 watts to 5 watts (high power option)

Operating voltage 48 Vdc or 85-264 Vac, 47-63 Hz with optional

Frequency band 2496 - 2690 MHz TX/RX

Frequency stability ±1.0 ppm

Channel bandwidth 5.5 or 6 MHz

Modulation Orthogonal frequency division multiplex

Transmission Time division duplex/time division multiplex

external power supply.

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL
ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND
RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE
PRESENTED WITHOUT WARRENTY OF ANY KIND. USERS MUST TAKE FULL
RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCT.

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND
SOFTWARE ARE PROVIDED “AS IS” WITH ALL FAULTS. NEXTNET WIRELESS DISCLAIMS ALL
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR
ARISING FOM A COUSRE OF DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL NEXTNET WIRELESS OR ITS SUPPLIERS BE LIABLE FOR ANY
INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING,
WITHOUT LIMITATION, LOST PROFITS OR LOSS OF DAMAGE TO DATA ARISING OUT OF
THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF NEXTNET WIRELESS HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

NextNet Wireless, Inc. recommends the antennas listed on the next page for base station installations:

iii

Front to

Depth

Width /

Antenna

Cross Pol.

Back

Special

Windage

(in)

(in)

Diameter

Length (in)

(lbs)

Weight

Disc. (dB)

(dB)

Ratio

Characteristics

mph

mph

mph

mph

mph

mph

mph

mph

mph

mph

mph

mph

mph

30 30 8.5 3 5.8 5.5 4.7 86 lbs @ 125

30 30 8.5 3 5.8 5.5 4.7 86 lbs @ 125

30 30 8.5 3 5.8 5.5 4.7 86 lbs @ 125

30 30 8.5 3 5.8 5.5 4.7 86 lbs @ 125

30 30 8.5 3 5.8 5.5 4.7 86 lbs @ 125

down tilt

down tilt

down tilt

down tilt

down tilt

Elevation

(Degrees)

Beamwidth

Azimuth

2 GHz Vertically Polarized Antennas

Beamwidth

Gain

Manufacturer Frequency (MHz)

Model / Part

(Degrees)

(dBi)

Number

Stella Doradus 2500-2700 15.8 92 9 null fill / 1º

Stella Doradus 2500-2700 16.2 90 7 null fill / 2º

Stella Doradus 2500-2700 15.7 92 9 null fill / 3º

Stella Doradus 2500-2700 15.8 91 8 null fill / 4º

Stella Doradus 2500-2700 15.5 90 9.5 null fill / 5º

SUS1

T2

SUS3

T4

SUS5

Part Number

N e x t N e t W ir el es s

501-1009-2301 24SD9890NV Stella Doradus 2300-2500 16 90 7 null fill

501-1002-2701 26SD98120NV Stella Doradus 2500-2700 15 120 7 null fill 21 30 8.5 35.8 5.5 5.3 86 lbs @ 125

501-1006-2701 26SD9860NV Stella Doradus 2500-2700 17.5 60 7 null fill 40 30 8.75 35.8 5.5 4.7 86 lbs @ 125

501-1009-2701 26SD9890NV Stella Doradus 2500-2700 16 90 7 null fill 35 35 8.6 35.8 5.5 4.7 86 lbs @ 125

501-1009-2791 26SD9890NV-

501-1009-2792 26SD9890NV-

501-1009-2793 26SD9890NV-

501-1009-2794 26SD9890NV-

501-1009-2795 26SD9890NV-

501-3004-2601 25SD2360 Stella Doradus 2500-2700 10 360 9 Omni N/A 26 2.86 43.3 1.9 -- 100 lbs @ 125

-- 26SD9005V Stella Doradus 2500-2700 19 90 5 -- 34 20 35.3 63.0 9.1 5.5 237 lbs @ 125

-- 26SD9007VN Stella Doradus 2500-2700 19 90 7.5 null fill 35.3 63.0 9.1 5.5 237 lbs @ 125

-- 26SD12005V Stella Doradus 2500-2700 18 120 5 -- 40 28 35.3 63.0 9.1 5.5 237 lbs @ 125

-- TA-2550 TIL-TEK 2500-2700 10 360 8 omni N/A 20 15 48.0 2.3 -- 31 lbs @ 125

iv

Depth

Width /

Length

Antenna

Cross Pol.

Front to

Special

Windage

(in)

(in)

Diameter

(in)

Weight (lbs)

Disc. (dB)

(dB)

Back Ratio

Characteristics

Windage

mph

Depth

Width /

Diameter

Length

Weight

Antenna

Cross Pol.

Front to

Back Ratio

Special

(in)

(in)

Disc. (dB)

Characteristics

(in)

(lbs)

(dB)

mph

mph

mph

mph

135 mph

(L/M/H)

Elevation

(Degrees)

Beamwidth

2 GHz Horizontally Polarized Antennas

Azimuth

(L/M/H)

(Degrees)

Beamwidth

(L/M/H)

Gain (dBi)

(MHz)

Frequency

Model / Part

2500-2700 19 90 5 -- 32 28 35.3 63 9.1 5.5 237 lbs @ 125

Manufacturer

Number

(L/M/H)

Elevation

(Degrees)

Beamwidth

3 GHz Vertically Polarized Antennas

dus

Azimuth

Beamwidth

Gain (dBi)

Model / Part

(Degrees)

(L/M/H)

Manufacturer Frequency

Number

(L/M/H)

3300-3400 13.4 360 5 Omni N/A 25 5.72 42.1 1.9 -- 22 lbs @ 135

3300-3600 15 120 7 null fill 25 30 5.4 28 5.4 5.3 67 lbs @ 125

3300-3600 17.5 60 7 null fill 33 30 6.5 28 5.5 4.7 67 lbs @ 125

3300-3600 16 90 7 null fill 35 35 5.4 28 5.5 4.7 67 lbs @ 125

3300-3600 13 360 6 Omni N/A 28 5.72 42.1 1.9 -- 4.95 lbs @

dus

dus

dus

dus

dus

NextNet

Wi r e l e s s

Part Number

-- 26SD9005H Stella Dora-

Part Number

N e x tN e t W i re l ess

501-3004-3301 33SD3360 Stella Dora-

501-1002-3401 35SD98120NV Stella Dora-

501-1006-3401 35SD9860NV Stella Dora-

501-1009-3401 35SD9890NV Stella Dora-

501-3004-3601 35SD3360 Stella Dora-

v

vi

C

HAPTER

0

C

ONTENTS

About this guide

Preface overview .................................................................. preface-xv

About this guide .................................................................. preface-xv

Chapters in this guide ............................................................. preface-xvi

Additional documentation ................................................. preface-xvii

Typographical conventions this guide uses ..................... preface-xviii

Where to go for more help ................................................ preface-xviii

Technical support .................................................................. preface-xviii

Documentation additions and corrections .............................preface-xviii

Introduction to backhaul installations

Chapter overview ..............................................................................1-1

System overview ................................................................................1-1

System overview .................................................................................. 1-1

Infrastructure overview ........................................................................ 1-2

Installation overview .........................................................................1-5

Installation steps common to RMB and BTS ...................................... 1-5

Planning the installation ..................................................................1-6

Choosing an installation location ......................................................... 1-7

Assessing network access provider equipment needs .......................... 1-8

Planning for the antennas and antenna installation tips ....................... 1-9

Designing the deployment of base stations .......................................... 1-9

Configuring network architecture

Chapter overview ............................................................................ 2-11

Architecture overview ..................................................................... 2-11

Configuring switches ......................................................................2-12

Configuring the switch at the cell site ............................................... 2-12

Configuring the head end switch ....................................................... 2-12

Configuring the ISP switch ................................................................ 2-12

Selecting backhaul links and circuits .............................................2-12

Selecting links based on maximum rate needed ................................ 2-12

Selecting links based on another rate ................................................. 2-12

Configuring the AP server

Chapter overview ............................................................................3-13

AP server overview .......................................................................... 3-13

Starting the AP server .....................................................................3-13

vii

Configuring the AP server ..............................................................3-14

Defining AP server users and administrators .................................... 3-14

Defining zone names ......................................................................... 3-18

Defining ISPs ..................................................................................... 3-20

Changing ISP information ................................................................. 3-21

Monitoring ISPs and base stations ..................................................... 3-23

Configuring a standby AP server

Chapter overview ............................................................................4-27

Standby AP server overview ............................................................4-27

Configuring the base station with standby AP server information 4-27

Setting up common configuration file and directory .........................4-28

Switching from the primary AP server to the secondary AP server .. 4-29

Configuring base stations

Chapter overview ............................................................................5-31

Before you begin .............................................................................5-31

Setting up connection methods used to configure base stations ..5-32

Setting up terminal emulation access ................................................. 5-32

Setting up Telnet access ..................................................................... 5-32

Setting up SNMP access ....................................................................5-33

Setting base station configuration parameters ...............................5-35

set airlink channel ............................................................................. 5-36

set airlink downlink power ................................................................ 5-36

set airlink downlink bias ...................................................................5-37

set system location ............................................................................. 5-39

set system name ................................................................................. 5-39

set airlink state ................................................................................... 5-39

Recommended parameter changes ................................................5-40

set system cell .................................................................................... 5-40

set system sector ................................................................................ 5-40

set DHCP state ...................................................................................5-40

Setting legacy and management VLAN IDs ...................................... 5-40

Setting up Syslog ............................................................................5-41

Configuring the authority that grants network access to CPEs ....5-42

Using base station caching feature for re-registering CPEs .............. 5-42

Remote authority: setting up the provisioning server to grant

CPEs network access ......................................................................... 5-42

Local authority: setting up the base station to grant CPEs

network access ................................................................................... 5-43

Configuring the time signal used by base stations ........................5-44

Configuring the GPS to supply the time signal ................................. 5-44

Configuring a base station to supply a time signal ............................ 5-44

viii Configuring, Installing, and Using Carrier Infrastructure

Installing the integral base transceiver station

Chapter overview ............................................................................6-49

Before you begin .............................................................................6-49

Cell wiring .......................................................................................6-50

Installation overview .......................................................................6-51

Installing the antenna and base station as a single unit ................6-52

Attaching antenna cable to base station ............................................. 6-53

Determining the degree of tilt for the antenna ................................... 6-53

Attaching lower antenna brackets to bolts on lower sides of antenna 6-56

Mounting the base station ..............................................................6-59

Mounting the base station to a wall ................................................... 6-59

Mounting the base station to a pole or tower ..................................... 6-60

Mounting the base station to a 19 inch rack ...................................... 6-66

Base station connectors ..................................................................6-67

Ethernet (data) and power connector .................................................6-67

TVS module connectors ..................................................................... 6-69

GPS connectors .................................................................................. 6-71

Serial interface connector .................................................................. 6-72

Antenna connector ............................................................................. 6-73

Connecting the antenna to the base station ...................................6-73

Antenna connection tips ..................................................................... 6-73

Connecting the antenna to the base station ........................................ 6-74

Connecting the GPS equipment to a base station .........................6-74

GPS equipment mounting tips ........................................................... 6-74

Connecting the GPS unit to the base station ...................................... 6-74

Connecting to the backbone network ............................................6-75

Grounding base stations .................................................................6-75

Powering base stations ...................................................................6-75

Powering tips ..................................................................................... 6-76

Powering the base station .................................................................. 6-76

Installing the rackmount base station (RMB)

Chapter overview ............................................................................7-77

Before you begin .............................................................................7-77

Installation overview .......................................................................7-78

Installing the mounting bracket and attaching cabinet to the

19-inch rack .....................................................................................7-79

Attaching the switch and power supply to the rack .......................7-80

Installing the RMBs into the cabinet .............................................7-80

Connecting RMBs to cell (cell wiring) ........................................... 7-81

ix

Connecting power to the RMBs .....................................................7-83

Powering the base station .................................................................. 7-83

Powering tips ..................................................................................... 7-84

Grounding the RMBs .....................................................................7-85

Turning on the RMB’s power ........................................................7-86

Base station connectors ..................................................................7-86

GPS connectors .................................................................................. 7-87

Power supply cable connections ........................................................7-87

Diagnostic cable DB9 connector pins ................................................ 7-88

Fuses and Ethernet cable connections on cabinet .............................. 7-88

Wiring alarms for RMBs .................................................................7-90

Connecting to the backbone network ............................................7-90

Testing and managing the network

Chapter overview ............................................................................8-93

Testing the setup overview .............................................................8-93

Installing the ISP’s provisioning server ............................................. 8-93

Ensuring CPE access to ISP VLAN .................................................. 8-94

Network management overview .....................................................8-94

Fault isolation overview ..................................................................... 8-94

Performance management overview .................................................. 8-95

Configuration management overview ................................................ 8-96

Accounting feature overview ............................................................. 8-96

GPS status codes

Appendix overview ........................................................................A-97

x Configuring, Installing, and Using Carrier Infrastructure

F

IGURES

About this guide
Introduction to backhaul installations

Rackmount base station (RMB) ...................................................................... 1-2

Rackmount base stations inside cabinet ........................................................1-3

Base station for indoor or outdoor installation ............................................ 1-4

Configuring network architecture
Configuring the AP server

AP server login page .......................................................................................3-14

Access Provider Management page .............................................................. 3-15

Configure page ................................................................................................3-16

Administrators page ........................................................................................ 3-17

New User page ................................................................................................3-18

Base Station Attributes page ..........................................................................3-19

ISP Management page ....................................................................................3-20

Create new ISP page .......................................................................................3-21

ISP details page ................................................................................................3-22

Exclude Zones page .......................................................................................3-23

Monitor ISPs - Base Stations page ...............................................................3-24

Base Station Properties page .........................................................................3-25

Configuring a standby AP server

Configuration files to share between primary and secondary AP servers 4-28

Configuring base stations
Installing the integral base transceiver station

Cell wiring diagram .........................................................................................6-50

Overview of entire antenna-to-BTS assembly ............................................6-52

Attaching antenna cable to base station ......................................................6-53

Brackets which help set antenna tilt .............................................................6-55

Bracket on antenna bolt ................................................................................. 6-56

Attaching L-shaped brackets to base station ..............................................6-56

Attaching antenna bracket to the L-shape bracket ....................................6-57

Attaching tilt guide bracket to the bracket on the antenna ...................... 6-57

Attaching tilt guide bracket to antenna bracket ..........................................6-58

Antenna brackets on bottom left and right sides of base station ............ 6-59

Base station mounting template ....................................................................6-60

Overview of entire BTS pole mounting bracket assembly ....................... 6-61

Location of bolts on the back of the base station ......................................6-62

Pole mounting clamps MP2 and MP 1 ........................................................6-63

Threaded rod assembly, top clamp ..............................................................6-64

MP2 top pole clamp, slots used to hang base station ...............................6-64

Base stations installed on rack .......................................................................6-66

Base station connectors ..................................................................................6-67

xi

Ethernet (data) and power connector ..........................................................6-68

Ethernet (data) and power connector ..........................................................6-68

TVS module connector: Base station connector ........................................6-70

TVS module connector: power/Ethernet connector ................................ 6-70

Connecting power cable to TVS module ....................................................6-71

GPS connector ................................................................................................ 6-71

Serial interface connector ...............................................................................6-73

Installing the rackmount base station (RMB)

Cabinet mounting bracket .............................................................................7-79

Location of switch and power supply in rack .............................................7-80

Cell wiring diagram .........................................................................................7-82

Power connections on bottom of cabinet ................................................... 7-84

Grounding the RMBs .....................................................................................7-85

RMB LEDs ......................................................................................................7-86

GPS connector ...............................................................................................7-87

Diagnostic cable: DB9 connector pins ........................................................7-88

Fuses and Ethernet cable connections on cabinet .....................................7-89

Removing fuse from cabinet .........................................................................7-89

External alarm connections ........................................................................... 7-90

Testing and managing the network
GPS status codes

xii Configuring, Installing, and Using Carrier Infrastructure

T

ABLES

About this guide

Chapters and appendices in the guide .............................................. preface-xvi

Additional documentation ................................................................ preface-xvii

Typographical conventions .............................................................preface-xviii

Contacting technical support .......................................................... preface-xviii

Introduction to backhaul installations

Advantages/disadvantages of location choices ............................................ 1-7

Recommended cable length ranges for 2.3 - 2.7 GHz ................................ 1-8

Recommended cable length ranges for 3.3 - 3.6 GHz ................................ 1-8

Configuring network architecture
Configuring the AP server

Create new ISP page .......................................................................................3-21

Configuring a standby AP server
Configuring base stations

Transmit power levels ..................................................................................... 5-36

Transmit power levels ..................................................................................... 5-37

Downlink rate based on modulation method ............................................. 5-38

Uplink data rate for 4-QAM modulation method ..................................... 5-38

Uplink data rate for 16-QAM modulation method ................................... 5-38

Uplink data rate for 64-QAM modulation method ................................... 5-38

Uplink data rate for 16-QAM lite modulation method ............................. 5-39

Methods used to grant CPEs access to ISPs’ VLANs ..............................5-42

Installing the integral base transceiver station

Ethernet/power base station cable choices ................................................6-68

Ethernet/power cable pins ............................................................................ 6-69

Function of wires in cable 597-6027-0xxx ..................................................6-69

GPS kits and cables ........................................................................................6-72

Daisy chain cable choices ...............................................................................6-72

Installing the rackmount base station (RMB)

Description of LEDs on the base station ...................................................7-86

Power cable pins .............................................................................................. 7-87

Testing and managing the network
GPS status codes

GPS status codes and meaning .................................................................... A-97

xiii

xiv Configuring, Installing, and Using Carrier Infrastructure

Preface overview

Thank you for choosing the Expedience™ system from NextNet Wireless. This guide
describes how to configure and install the system’s base transceiver station (BTS) and the
rack-mounted base stations system (RMB).

This preface describes:

• Audience for this guide

P REFACE

A

BOUT THIS GUIDE

• Additional documentation

• Typographical conventions used in this guide

• Where to go for more help

About this guide

This guide describes how to configure and install the system’s base station. It also describes
how to configure and work with the access provider (AP) server.

This guide is intended for network and system administrators who must install, configure, and
manage base stations and the AP server. This guide provides detailed configuration and
installation instructions.

It is assumed readers of this guide are familiar with:

• Basic networking concepts

• Layer 2 (link layer) of OSI model

• Cell structure engineering

xv

Chapters in this guide

Table i describes the chapters and appendices in this guide.

Table i Chapters and appendices in the guide

Chapter Description

Preface Provides an overview of the guide, related documentation,

Chapter 1 Introduction to
backhaul installations

Chapter 2 Configuring
network architecture

Chapter 3 Configuring the
AP server

Chapter 4 Configuring a
standby AP server

Chapter 5 Configuring base
stations

Chapter 6 Installing the
integral base transceiver
stations (I-BTS)

Chapter 7 Installing the
rackmount base station
(RMB)

Chapter 8 Testing and
managing the network

Appendix A GPS status
codes

Appendix B Supported
frequency ranges

the guide’s intended audience, typographical conventions,
and methods for obtaining technical support.

Provides an overview of the Expedience system and of the
system’s base station component. It provides an installation
overview and describes things you need to consider before
installing base stations.

Describes a simple network topology and provides an
overview of how to configure switches at the cell site, the
head end, and the ISP sites.

Describes how to configure and use the access provider (AP)
server.

Explains how to configure a standby AP server. The
network will use the standby server if the primary server
becomes unavailable.

Describes how to configure base stations, including how to
use Telnet or Term to set up a base station before deploying
it and mounting it to a tower or building. The chapter also
describes how to configure base stations after you have
deployed them, for example, to maintain the system and
optimize system performance.

Explains how to install a base station at a cell site. Also
describes the components used to mount the base station on
a building or tower.

Describes how to install the rackmount base station (RMB),
including installing the cabinet onto a 19 inch rack, installing
the power supply and switch, installing the RMB into the
base station cabinet and connecting the RMBs to the cell and
to cell-site components.

Explains how to work with the ISP to ensure the network is
installed and running correctly.

Describes the codes that the GPS can generate.

Provides reference information about the frequency ranges
in which the equipment can operate.

xvi Configuring, Installing, and Using Carrier Infrastructure

Additional documentation

If you cannot find the information you need in this guide, you may want to refer to the
documents described in Table ii.

Table ii Additional documentation

Guide Description

Getting Started with the
Expedience System

Configuring, Installing, and
Using Carrier Infrastructure

Using the NextNet
Operating System (NNOS)

Configuring and monitoring
the ISP network

Expedience Broadband
Wireless Access Modem

Installing the RSU Intended for use by your subscribers, this guide describes

Expedience NLOS
Outdoor Broadband
Wireless Access Modem

Provides an overview of the Expedience system, its
components, its network architecture, and options for
selecting a deployment scheme for the system in the service
provider (backbone) network.

This is the guide you are currently reading. Describes how to
set up and configure base stations, including how to connect
antenna systems, the backbone network equipment, and
global positioning system (GPS) equipment.

Also provides an overview of the AP server and how to
configure the AP server for your network.

Describes the NextNet operating system (NNOS), which is
the common operating system for the system’s base station
devices and customer premise equipment (CPE) devices.
This guide describes how you can configure the operating
system on devices by using commands issued from Telnet,
Terminal, or a Web interface.

Intended for use by an ISP. Provides an overview of the
Expedience system, its components, and its network
architecture. This guide describes how to install and
configure the ISP’s provisioning server. It describes how to
define service level agreements (SLAs).

Intended for use by your subscribers, this guide describes
how to install a RSU (that is, an indoor CPE) at a subscriber
site. Your subscribers can completely install the RSU.

The guide explains, in detail, how to connect the RSU to a
computer or to a network device. It explains system pre­requisites, and provides troubleshooting information.

This guide is available in electronic (pdf) format, on the
CD-ROM that accompanies the LinkMonitor software.

how to quickly install a RSU directly to a computer.

Intended for use by a professional installer, this guide
describes how to install an outdoor CPE.

xvii

Typographical conventions this guide uses

Table iii describes the typographical conventions that this guide uses.

Table iii Typographical conventions

Convention Meaning

Bold face If you are using a graphical user interface (GUI), bold face indicates a

button, menu option, icon, and so on, that you manipulate directly.
If you are using a command line interface, bold face indicates commands

and keywords.
Bold face can also indicate information that you must enter.

Italic face Arguments for which you supply values are in italic face.

Courier
(mono-spaced) font

[ ... ] Arguments that appear inside square brackets [ ], are optional.

{..} | {..} Required keywords are grouped in braces and separated by vertical bars.

Note Notes contain helpful suggestions for the reader.

<...> Non-printing characters, such as passwords, appear in angle brackets.

Caution Cautions contain information about which the reader must exercise care.

Warning Warnings contain information about how readers might do something

A command you type in, exactly as it appears, at a command line.

Also, when the guide shows a system prompt, the default system prompt
appears inside square brackets.

resulting in harm to themselves or in damage to equipment or data.

Where to go for more help

This section describes how to obtain support for your NextNet Wireless product. It also
describes how to provide comments on the product documentation.

Technical support

NextNet Wireless is committed to providing our customers with high quality technical
support. Table iv describes how to contact technical support.

Table iv Contacting technical support

Contact Description

Phone [phone]

E-mail [e-mail]

Web site www.nextnetwireless.com

Documentation additions and corrections

If you find documentation errors, or want to see additional information not presented in this
guide, please contact our documentation group at the following e-mail address:

[e-mail]

xviii Configuring, Installing, and Using Carrier Infrastructure

Introduction to backhaul installations

Chapter overview

This chapter provides an overview of the Expedience system and of the system’s
infrastructure components:

• The base station, which comes in two forms:

C HAPTER

1

• The base transceiver station (BTS)

• The rackmount base station (RMB)

• The access provider (AP) server

• The network switches

The chapter provides an installation overview. It also describes things you need to consider
before installing base stations.

System overview

This section provides a brief overview of the Expedience system, as well as the infrastructure
that network access providers must install. For additional system overview information, refer
to the guide “Getting Started with the Expedience System.”

System overview

NextNet Wireless designed the Expedience system to give small office, home office (SOHO),
and residential subscribers high speed, wireless access to network communication systems,
such as the Internet. The Expedience system is an end-to-end broadband wireless access
system and operates in several frequency ranges.

The system was designed to allow network access providers to re-sell network bandwidth to
ISPs on a wholesale basis. In turn, the ISPs sell access to their subscribers on a retail basis. To
support multiple ISPs on the network, the system uses virtual LAN (VLAN) technology.

The system does not
CPEs. The air link between base stations and CPEs functions as an Ethernet bridge carrying
IP/ARP packets. Time division duplex (TDD) and cellular deployment offer you flexibility in
adjusting downlink versus uplink airtime.

have a line-of-sight (LOS) requirement between the base station and the

1-1

Infrastructure overview

The base station and AP server are network infrastructure components supplied by NextNet
Wireless. The network access provider configures and maintains this equipment.

Additional infrastructure components include switches for use at the base station cell sites,
and the head-end switch. These switches are supplied by the network access provider. If
desired, the network access provider can purchase the switches through NextNet Wireless.

Base station overview

The base station maintains contact with CPEs at your subscribers’ sites. The base station
integrates the transceiver and modem into one device.

Under typical configurations, the base station covers an approximate radius of 2 to 3 miles,
with a 5 mile maximum. If desired, network access providers can configure their base stations
to cover a maximum radius of 18 miles. To cover up to 18 miles, the network access provider
enables the extended range feature.

There are two types of base stations offered by NextNet Wireless:

• An indoor-only base station that slides into a base station cabinet after the cabinet has
been installed on a standard 19 inch rack. This base station is known as the rackmount
base station (RMB).

• A base station that can be installed indoors or outdoors. This base station can be installed
on a tower, on a roof, on a wall, or on a rack. The antenna can be installed on the base
station itself, or the antenna can be installed separately. This base station is known as the
integral base transceiver station (BTS).

Figure 1.1 shows an individual RMB which will be installed inside a cabinet. This cabinet is
then installed on a standard 19 inch rack. Up to 8 RMBs can be installed inside a cabinet.

Figure 1.1 Rackmount base station (RMB)

1-2 Configuring, Installing, and Using Carrier Infrastructure

Figure 1.2 shows 8 RMBs installed inside the base station cabinet.

Figure 1.2 Rackmount base stations inside cabinet

1-3

Figure 1.3 shows a base station that can be installed outdoors or indoors The figure shows the
antenna installed on the base station. If desired, you can install the antenna separately from
the base station.

Figure 1.3 Base station for indoor or outdoor installation

AP server overview

The AP server acts as a relay for the CPE registration events which arrive from base stations
(on the management VLAN) and are forwarded to the correct ISP provisioning server (over
the control VLAN).

The base stations each have a TCP/IP connection to the AP server. The base stations use
their connection to forward CPE registration requests to the AP server.

The AP server is provided by NextNet Wireless.

Head-end switch, base station cell site switch, and ISP
switch overview

The network access provider must supply switches for their network, which include the head­end switch and the switches used at the base station cell site. The network access provider

1-4 Configuring, Installing, and Using Carrier Infrastructure

must also assist their ISPs when the ISPs program their switches with the proper ISP VLAN
IDs.

The base stations are grouped together into cells, with between 1 and 6 base stations at a cell
site. (If the network access provider chooses to stack base stations, more than 6 base stations
can exist in a cell.) To form the base station LAN, the base stations are connected to a switch
at the cell site.

WAN links are then used to connect the cell sites to the head-end switch. The head-end
switch splits incoming traffic to the management VLAN and to the appropriate ISP VLAN.
The ISP then has a configured switch that controls traffic coming into and out of the ISP
VLANs.

Installation overview

This section provides a high-level overview of how to install the indoor, rackmount base
station (RMB), as well as the integral base transceiver stations (BTS) that can be installed
outdoors or indoors.

Installation steps common to RMB and BTS

1 Plan the installation of base stations:

a Choose an appropriate location for the base station installation. For more information,

refer to the section “Choosing an installation location” on page 1-7 in this chapter.

b Design the deployment of base stations. Determine how base stations will be deployed

by marking a location on a map that shows where each base station will be installed.
Also determine naming conventions for cells, sectors, zones, and base stations names.
For more information, refer to the section, “Designing the deployment of base
stations” on page 1-9.

2 Plan for system components that you need to supply to complete the network. For more

information, refer to the section “Assessing network access provider equipment needs” on
page 1-8 in this chapter.

3 Install and configure the access provider (AP) server. For more information, refer to

Chapter 3, “Installing the AP server,” in this guide.

4 On the AP server, configure zone names, VLAN IDs, and the ISP IDs. For more

information, refer to Chapter 3, “Installing the AP server,” in this guide.

5 Using the NextNet Operating System (NNOS), configure the base stations before

deploying them in the field. For more information, refer to the chapter “Configuring base
stations” in this guide.

RMB installation overview

This section provides a high-level overview of how to install the base station cabinet onto a
19 inch rack, and then how to install the base stations into the cabinet.

1 Slide the metal base station cabinet into the 19 inch rack.
2 Install the power supply onto the 19 inch rack.
3 Install the switch onto the 19 inch rack.
4 Slide each base station into the appropriate slot in the cabinet on the rack.
5 If you are using a 5 watt base station, install the 5 watt channel specific filter.
6 Plug in the cables which include:

1-5

• GPS cables

• Antenna cables

• Ethernet cables

• Power cables

• Alarm cables

Also, make sure that the fuses are installed properly.

7 Plug in the power cable to the RMBs in the cabinet, make sure the power supply is

working, then turn on each RMB.

BTS installation overview

This section provides a high-level overview of the base station installation process. Other
sections in this guide then explain these installation tasks in detail.

The tasks you perform to deploy base stations are:

1 Mount the base station at the site you selected. For more information, refer to the section

“Mounting and grounding the base station” on page 6-57 in this guide.

2 Connect the antenna to the base station, as described in the section “Connecting the

antenna to the base station” on page 6-59.

3 Mount the GPS device and connect it to the base station. One GPS device can service the

multiple base stations at a cell site. For more information, refer to the section “Connecting
the GPS equipment to a base station” on page 6-59 in this guide.

4 Connect the base station to the transcient voltage suppressor (TVS) module, then connect

the TVS module to your network switch.

The TVS module splits the connection: one connection goes to a switch that connects to
your network, and the other goes to a power supply. For more information, refer to the
section “Connecting to the backbone network” on page 6-60 in this guide.

5 Power the base stations by connecting the TVS module to the power supply. For more

information, refer to the section “Powering base stations” on page 6-61 in this guide.

The TVS module provides lightning protection. The TVS module also splits the
connection: one connection goes to the switch and the other goes to a power supply.

6 Configure cell site switches, the head-end switch, and the ISP switches. For more

information, refer to “Configuring switches” on page 2-12 in this guide.

7 Test the network by working with an ISP to:

• Install the ISP’s provisioning server

• Test the AP server to Provisioning server connection.

• Test that CPEs can access the ISP’s VLAN(s).

Planning the installation

This section describes issues you need to consider before you install the base stations,
including:

• Choosing locations for the base station installation

• Planning for service provider equipment components

• Selecting antennas

1-6 Configuring, Installing, and Using Carrier Infrastructure

• Defining naming conventions for cells, sectors, base stations and VLANs

Choosing an installation location

The base station’s location at a site depends on many factors, including the site’s physical
environment, the coverage pattern you want to achieve, and the ease of maintenance you
require.

RMB installation location

The RMB is always installed indoors, inside the base station cabinet and on a standard 19 inch
rack. In turn, the rack is installed in an indoor equipment room or in another type of indoor
housing unit such as a shed near the tower.

BTS installation location

Table 1.1 describes some of the locations you might want to consider for a BTS.

Table 1.1 Advantages/disadvantages of location choices

Location Advantages Disadvantages

On tower, at
antennas

At base of
tower

On rooftop You can use a shorter coaxial cable

Installing at the antennas offers
cost savings, due to the fact that
you can use a shorter coaxial cable
to connect the base stations to your
antennas. There is lower signal loss
in shorter cables.

Placing the base stations at the base
of a tower offers simpler
installation and maintenance than a
base station installed on the tower,
at the antennas.

Base station installation and
maintenance are simpler than other
options.

to connect base stations to
antennas. As such, you can
probably operate at higher power
levels, and still stay within signal
loss criteria.

Rooftop access is usually available,
making installation and
maintenance easier. Also, a housing
unit for the backbone network
switch, power supplies, and other
equipment is typically available.

When you install base stations near
the top of the tower, installation and
maintenance are more difficult.

If you install at the base of the
tower, you need to run a coaxial
cable from the base stations to the
antennas. This cable must be of
sufficient size to reduce signal loss,
which may increase costs.

Installation still requires you to
install the antennas and coaxial
cable.

You need to obtain permission to
use a rooftop, and comply with
building codes.

Note: Regardless of the location you choose, plan to provide a weatherproof housing unit for
the network switch, the power supply, and the TVS equipment.

1-7

Cable loss ranges

Use tables Table 1.2 and Table 1.3 to determine the cable size you need, based on signal loss.

Table 1.2 Recommended cable length ranges for 2.3 - 2.7 GHz

Length of
cable drop Cable type

4 ft to 85 ft 1/2 inch LDF 3.52 .14 to 2.99

50 ft to 110 ft 5/8 inch LDF 2.65 1.33 to 2.92

90 ft to 150 ft 7/8 inch LDF 2.02 1.82 to 3.03

125 ft to 200 ft 1 1/4 inch LDF 1.47 1.84 to 2.94

Table 1.3 Recommended cable length ranges for 3.3 - 3.6 GHz

Length of
cable drop Cable type

4 ft to 85 ft 1/2 inch LDF 4.39 .18 to 2.85

50 ft to 110 ft 5/8 inch LDF 3.35 1.68 to 2.85

90 ft to 150 ft 7/8 inch LDF 2.55 1.91 to 2.93

125 ft to 200 ft 1 1/4 inch LDF* 1.84 2.30 to 2.94

*Note: The 1 1/4 inch LDF cable is not recommended for systems running at a
range higher than 3.3 GHz.

Signal loss per
100 feet

Signal loss per
100 feet

Signal loss
range

Signal loss
range

Placement of base stations and switches on network

Make sure your network design places the base stations behind a switch so that the base
station sees only Ethernet traffic addressed to it. The switch you choose needs to be able to
handle the Ethernet traffic on your network

Assessing network access provider equipment needs

Before you install and deploy the base station, ensure you have made provisions for the
following components:

• Power and data connection between the base station and your network

• Global position system (GPS) for proper TDD functions. You must use the GPS supplied
with the Expedience system.

• Antenna system for transmitting and receiving signals for the base stations.

•SNMP server

• DHCP server, if desired, to supply IP addresses to base stations

• AP server

• Weatherproof housing for the backbone network switch, power supplies, and UPS. Also
supply weatherproof housing for the TVS module, which provides lightning protection.

• Coaxial cable to connect the base station to the antenna.

• Tower or building structure on which to mount cell site equipment.

Equipment needs of ISP

As a network access provider, you provide network bandwidth to ISPs. The ISPs in turn sell
network access to subscribers. Make sure your ISPs plan for the following pieces of
equipment on the ISP VLAN:

1-8 Configuring, Installing, and Using Carrier Infrastructure

•DHCP server

• Customer care server and a customer relationship management application

• Provisioning server

• Switch to receive and direct traffic from the network access provider

• Router to route traffic to the Internet

Planning for the antennas and antenna installation tips

The type of antenna you choose depends on the cell type and pattern you want to use. Make
sure:

• The antenna provides an appropriate pattern for the application, with uptilt and downtilt
as required.

• The installation of the antenna complies with the vendor’s installation directions, and that
it meets building codes.

After you have installed an antenna, you need to connect it to a mounted base station. For
instructions on connecting the antenna to a base station, refer to the section “Connecting the
antenna to the base station” on page 6-59.

Designing the deployment of base stations

To plan for how base stations will be deployed:

1 Determine a naming convention for base stations.
2 Using a map of the area to be covered, define the zone names that will be used.

For example, an access provider can divide a metropolitan areas into North, South, East,
West, and Central zones. The network access provider then assigns base stations to a
specific zone by using the set system location command. Keep in mind that multiple base
stations may be assigned to the same zone. Zones allow the ISPs to differentiate services to
subscribers by allowing subscribers to operate in specific regions or clusters of zones.

3 On a map, mark each location where base stations are installed.
4 For each base station, document your design choices. Please note that some parameters are

optional, depending on how you design the system.

• Base station name (required)

• Zone name (required)

• Cell name (optional)

• Sector name (optional)

•Channel (required)

• Default VLAN for legacy CPEs (optional, default is 1)

• Management VLAN ID (optional; default ID is 1)

1-9

1-10 Configuring, Installing, and Using Carrier Infrastructure

C

ONFIGURING

Chapter overview

This chapter describes a simple network topology. It provides an overview of how to
configure switches at the cell site, the head end, and the ISP sites.

Architecture overview

C HAPTER

2

NETWORK ARCHITECTURE

The hierarchy of the network architecture uses the concept of two layers: the access layer and
the backbone layer.

The functions of the access layer include connecting users — which include subscribers and
the ISPs — to the backbone layer.

Subscribers use components on the access layer (the CPEs and the base stations) to obtain
physical access to the network. The subscriber’s CPE communicates with a base station over
a radio link which is commonly called the air link. The base stations that communicate with
the CPEs are grouped into cells. The base stations in each cell are connected to a switch at the
cell site and a base station LAN is formed. The switches at the cell sites then use WAN links
to connect to the head-end switch.

The ISPs also use the access layer to connect to the backbone layer. An ISP receives network
access requests from components on the backbone layer (specifically the AP server on the
management VLAN). These requests for access are sent to the appropriate ISP. The ISP then
grants or denies the request. If access is granted, the ISP provides the subscriber’s host
computer with an IP address and traffic is shaped for that host computer according to the
subscriber’s service level agreement (SLA). Traffic to and from the host computer travels
through the backbone layer

The functions of the backbone layer include quickly switching incoming WAN trunk traffic
to the management VLAN and to the ISP VLANs. The backbone layer also returns Internet
traffic from the ISP to the appropriate base station and subscriber’s CPE.

2-11

Configuring switches

This section describes configuration of the following switches:

• Switch connecting base stations at the cell site

• Head end switch

• ISP switch

Configuring the switch at the cell site

At the cell site, the network access provider must program a port on the switch to be a WAN
trunk to the head end switch.

Configuring the head end switch

WAN trunk ports on the head end switch must be configured to accept traffic from the cell
sites.

The head end switch then splits the traffic to the Management VLAN and the ISP VLANs.
The network access provider configures edge ports on the head end switch with the
Management VLAN ID, and the IDs of all the ISP VLANs.

Configuring the ISP switch

The ISP switch must be configured with the IDs of VLANs provided to the ISP by the
network access provider. A port on the switch is also configured with the ID of the control
VLAN.

Selecting backhaul links and circuits

Network access providers must select the links or circuits that connect the cells to the
backbone network. Each cell may have one or more base stations, and each base station
serves a sector within a cell. Service providers typically deploy cells in four or six sectors.

Depending on the upstream/downstream ratio selected and the configuration of the sector
covered by the base station, downlink capacity of up to 8 mb per second and uplink capacity
up to 4 mb per second may be required.

Adequate backhaul facilities must be provided to support this throughput.

Selecting links based on maximum rate needed

You can choose a link based on the maximum bit-transfer rate you might need. For example,
you might use DS-3 circuits to connect cells to a switch, and then connect those switches
together, using the appropriate higher-rate links.

Selecting links based on another rate

You might want to choose a link providing another data transfer rate. The link you choose
might depend on the expected and actual traffic rates for a given cell.

Choosing this option means you get lower cost circuits, but you also might get lower
throughput, increased response latency, and so on.

2-12 Configuring, Installing, and Using Carrier Infrastructure

C

Chapter overview

This chapter describes how to configure and use the access provider (AP) server.

AP server overview

ONFIGURING

THE

C HAPTER

3

AP

SERVER

All base stations connect to the AP server using a TCP/IP session. Using this connection, the
base stations transfer incoming registration requests from CPEs to the AP server. The AP
server forwards the request to the proper provisioning server for authorization.

The AP server defines the zones and ISPs that comprise network access provider’s network.

Note the following about the AP server:

• The connection between the AP server and the provisioning server is always established
from the AP server to the Provisioning server. Network access providers or ISPs cannot
use the provisioning server to define or attempt a connection back to the AP server.

• The AP server does NOT accept CPE registrations from base stations that do not have a
zone setting that the AP server can recognize.

Starting the AP server

The AP server was designed to use a Java servlet called Tomcat.

1 To run the Tomcat servlet, type the following at a command prompt:

net start tomcat

2 To stop the Tomcat servlet, type the following at a command prompt:

net stop tomcat

3 To verify that the AP server is installed correctly, open an Internet browser. In the

browser’s address field, type the following address:

http://localhost:8080/ap

3-13

Configuring the AP server

To configure the AP server, you must define AP server users, configure zone names, VLAN
IDs, ISP names, and ISP IDs.

Defining AP server users and administrators

To define users and administrators of the AP server:

1 Open a web browser. In the browser’s address field, type the address of the AP server.

A login page appears.

Figure 3.1 AP server login page

4.0.0

If you are logging into the server for the first time, log in with the following defaults:

• User name: administrator

• Password: password

If you are logging in for the second or subsequent time, enter your user name and
password in the appropriate fields.

3-14 Configuring, Installing, and Using Carrier Infrastructure

The Access Provider Management page opens.

Figure 3.2 Access Provider Management page

3-15

2 From the Access Provider Management page, click the Configure link. The Configure

page opens.

Figure 3.3 Configure page

3-16 Configuring, Installing, and Using Carrier Infrastructure

3

From the Configure page, click Administrators.The Administrators page opens.

Figure 3.4 Administrators page

4 In the Changes on this page require your password here: field, type your password.

3-17

5 Click Create New User. The New User page opens.

Figure 3.5 New User page

4.3.8

ap4.nextnetwireless.com

MK

6 In the Changes on this page require your password here: field, type your password.
7 Complete the fields on the page, then click Save Changes.

Defining zone names

To define zone names:

1 From the AP server’s home page, click Configure.

3-18 Configuring, Installing, and Using Carrier Infrastructure

2

From the Configure page, click the Base Station Configuration link.

Figure 3.6 Base Station Attributes page

4.3.8

CityCentral

CityNorth

CitySouth

CityEast

CityWest

MK

3 In the Enter new zones below, comma separated field, type the names of base station

zones. Use commas to separate names.

4 For load balancing purposes, you can enter limits on the amount of traffic that a base

station can handle on both the uplink and downlink. If a CPE tries to register with a base
station when either of the limits are met, the CPE will receive a notice that it should try to
register with another, less busy base station. If no such base station is available, the CPE
registers with the first base station.

• To specify the limit of uplink traffic that a base station can handle before the base

stations indicates to registering CPEs to look for another base station, type the limit in
the Uplink Base Threshold field.

• To specify the limit of downlink traffic, type the limit in the Downlink Base

Threshold field.

5 To specify the maximum number of VoIP calls that a base station can handle, type the

limit in the Max VoIP calls per Base field.

6 Click Save Zone Changes. The new zone names appear in the Zone column.

Registering with the AP server after Zones defined

After you define zones, the base stations must re-register with the AP server so that the AP
server recognizes the base station as having a correct zone.

To re-register the base station with the AP server:

1 Establish a terminal session with the base station.

3-19

a From the Base Station Properties page (see Figure 3.12), click on the IP address of the

base station.

b A terminal session starts, where you can log in to the NNOS.

2 To assign the base station to a zone, use the NNOS command “set system location”. This

generates a base station registration record.

3 To save the settings on the base station, type write. The change is written to Flash memory

on the base station.

4 Close the terminal session.
5 To verify that the base station’s zone name is correct, refresh the web browser.

Defining ISPs

To define ISPs:

1 From the AP server’s home page, click Configure.
2 On the Configure page, click the ISP Management link.

Figure 3.7 ISP Management page

3-20 Configuring, Installing, and Using Carrier Infrastructure

3

To add a new ISP, click the Add ISP button.The Create new ISP page opens.

Figure 3.8 Create new ISP page

Table 3.1 describes the fields on the Create new ISP page that access providers must
complete to add ISPs.

Table 3.1 Create new ISP page

Field Description

ISP Name A name for the ISP

Billing Record Time The time of day when the provisioning server is polled for billing

information. This information includes the number of CPEs that
are assigned to a service level agreement.

IP address IP address of the ISP provisioning server

VLANs ID numbers of the VLANs assigned to the ISP

Mfg Tags An embedded number on the CPE that determines which Internet

Service Provider (ISP) owns the CPE device

Changing ISP information

To change the information about the ISP:

3-21

1 From the ISP Management page, click the link of the name of the ISP whose information

you want to change.

Figure 3.9 ISP details page

2 Alter the fields on the page as desired. Click Save Changes.

Excluding zones

Available Zones

Include Zone

Exclude Zone

3-22 Configuring, Installing, and Using Carrier Infrastructure

Figure 3.10 Exclude Zones page

Monitoring ISPs and base stations

Using the AP server, you can view information about the status of ISPs and base stations that
are part of the network access provider network.

To view information about ISPs and base stations:

3-23

1 From the AP server home page, click Monitor. The Monitor ISPs - Base Stations page

opens.

Figure 3.11 Monitor ISPs - Base Stations page

3-24 Configuring, Installing, and Using Carrier Infrastructure

2

To start a terminal session with the base station, and change the base station’s parameters
using the NextNet Operating System (NNOS), click the name of the base station.The Base
Station Properties page opens.

Figure 3.12 Base Station Properties page

4.0.0

CityCentralS1C2

12

153.149.100.54

3 Click the IP address. A terminal session starts with the base station.

MK

For more information about changing NNOS parameters on base stations, refer to the
guide “Using the NextNet Operating System (NNOS).”

3-25

3-26 Configuring, Installing, and Using Carrier Infrastructure

C

ONFIGURING

Chapter overview

This chapter describes how to configure a standby AP server. The network will use the
standby server if the primary server becomes unavailable.

Standby AP server overview

A

STANDBY

AP

C HAPTER

4

SERVER

The standby AP server can be put into service if the primary AP server is not available.

Note: Make sure that the primary and secondary server are not running at the same time.
Also, make sure that the server on which shared AP configuration files reside is not powered
off while either the primary or secondary server is running.

During AP server outage, subscriber data traffic is passed from CPEs and VLANs.

The elements of the standby AP server solution are:

• Primary AP server

• Secondary AP server

• Shared AP server configuration files

To maintain overall network integrity, configure the primary and secondary AP server with
identical information, including the ISP ID assignments and VLAN assignments.

Configuring the base station with standby AP server
information

To configure the base station so it can use a standby AP server:

1 Set the address of the primary and secondary server:

set aaa server address p.p.p.p,s.s.s.s

where:

p.p.p.p is the address of the primary AP server.

s.s.s.s is the IP address of the secondary AP server.

4-27

2 To save the changes to Flash memory, type the following:

write

3 To make sure the setting is correct, type:

show aaa

The following information appears:

aaa authority => remote

aaa cache => enabled

aaa port => 12541

aaa server address => 000.111.222.333 999.888.777.666

Note: 000.111.222.333 999.888.777.666 represent the IP addresses of the primary and
secondary AP server respectively.

aaa state => enabled

Setting up common configuration file and directory

This section describes how to set up a common configuration directory on a shared network
drive.

After the AP server software is installed, the following directories exist:

• NextNetHome

• NextNetConfigFolder

The NextNetConfigFolder contains the following configuration files which need to be shared
between the primary and secondary AP servers.

Figure 4.1 Configuration files to share between primary and secondary AP servers

File Description

nextnet.properties Specifies application parameters and the location of billing record folder

ap_logging.properties Specifies the location of audit logs and application logs. Also lists logging

parameters

users.xml A list of user names

isps.xml A list of ISPs

zones.xml A list of zone names

Create a shared directory on a server that stores these files. This shared directory can reside
on either the primary or secondary server, if desired.

To create a shared directory:

1 Create the shared directory on the chosen machine:

\\ConfigServer\nn\config

2 Create a user called TomcatServiceUser. Set permissions on the shared directory to

grant all privileges to the user.

3 On both the primary and secondary servers, set up the same user name:

TomcatServiceUser

This user ID is used to run the Tomcat service. The ID must have permission from both
primary and secondary AP servers to access the shared directory on the ConfigServer.

4-28 Configuring, Installing, and Using Carrier Infrastructure

This user should be a member of the group users. The user name and password must
match the user account and password on the ConfigServer.

4 Install the AP server using the standard installation program. When the installation

program prompts you:

a Place the NextNetHomedirectory on a local drive.

b Specify that the NextNetConfigFolder resides on the remote share.

5 On the primary and secondary servers, specify that the Tomcat service logs on as

TomcatServiceUser:

aFrom the Start menu, select Settings, Control Panel, Administrative Tools. From

the list of items that appears, select Services. The Services window opens.

b Double click on the Tomcat service. A Properties window for the service opens.

c Click the Log On tab.

dIn the This Account: field, type the account name. In the Password: and Confirm

Password: fields, type the password of the user account.

6 On the primary AP server, specify the startup type as Automatic.
7 On the secondary AP server specify the startup type as Manual.
8 Click on the General tab, and specify the following:

a For the primary AP server, from the Startup type drop down list box, select

Automatic.

b For the secondary AP server, from Startup type the drop down list box, select

Manual.

Testing the installation

To test the installation:

1 From a command prompt, type:

net start Tomcat

If the service starts correctly, the Administrative Tools/Event Viewer shows that the
service started.

2 Reboot the AP server. Without being logged on, you should be able to browse to the AP

web application from another machine.

Location of audit files and log files

Directories within the NextNetConfigFolder directory contain the audit logs and application
logs. If you configured a shared space on a network directory for the primary and secondary
AP server, the log files will be stored in the shared directory named NextNetConfigFolder.

If you have turned on the feature than enables debugging information to be written to a file,
note that the performance of the AP server might degrade, as the server might be saving a lot
of information to a network drive.

If desired, you can configure a different location where the files can be stored, such as
C:/nn/logs.

Switching from the primary AP server to the secondary AP
server

To switch from the primary AP server to the secondary AP server:

4-29

1 Stop the primary AP server. To do so, from a command prompt on the primary AP server,

type:

net stop Tomcat

2 Start the secondary AP server. To do so, from a command prompt on the secondary AP

server, type:

net start Tomcat

After the primary server is stopped, each base station automatically detects the loss of the
primary connection. The base station then attempts to connect with the secondary AP server.

The secondary server connects to the ISP provisioning servers. Since this connection
overrides any previous connection with the provisioning servers, you must stop the primary
AP server before starting the secondary AP server.

4-30 Configuring, Installing, and Using Carrier Infrastructure

Chapter overview

This chapter describes how to configure base stations. It describes:

• How to configure the base station so you can communicate with the base station using a
term connection, an SNMP connection, a web connection, and a Telnet connection

• The operating system parameters to configure before you deploy base stations

C

ONFIGURING

C HAPTER

5

BASE STATIONS

• How to set up a system component (called an “authority”) that grants CPEs access to your
network

Before you begin

To configure base stations before you deploy them on towers or buildings, you must first
supply power to the base station, and connect the base station to a PC using the serial cable/
serial connection. To perform these tasks:

1 Place an RF 50 ohm load or at least a 10dB RF attenuator on the RF connector. The load

or attenuator must be capable of 10 watts of dissipation.

2 Connect the base station to the TVS module by plugging the provided cable into the left-

most connector on the bottom of the base station. Then, plug the TVS module into a
power source.

3 Use the serial interface cable to connect your computer to the base station.
4 On your computer, set up terminal emulation access to the base station, as described in the

section “Setting up terminal emulation access” on page 5-32 in this guide.

5 If you have not already done so, start a terminal emulation session with the base station

you want to configure and log on to NNOS. (If you are using a Windows operating
system, you may want to use the Hyperterminal application to open the connection
defined in step 4.)

6 Configure the base station as described in the following sections of this chapter:

• “Setting base station configuration parameters” on page 5-35

• “Recommended parameter changes” on page 5-40

• “Setting up Syslog” on page 5-41

• “Configuring the authority that grants network access to CPEs” on page 5-42

• “Configuring the time signal used by base stations” on page 5-44

5-31

Setting up connection methods used to configure
base stations

The Expedience system allows you to connect to a base station using many methods:

• Terminal emulation over a serial line

•Telnet

•Web server

•SNMP server

Before you can use a particular method to connect to the base station, you must configure its
connection.

To configure the base station initially, you will most likely use a serial connection and a
terminal emulation session. Terminal emulation allows access through a direct RS-232
connection from a personal computer to the base station.

Setting up terminal emulation access

The terminal emulation connection is a physical RS-232 cable connection, between the base
station and a PC. Once the connection is set up, you can use a program—such as
Hyperterminal under the Windows operating system—to configure and communicate with
the base station.

Terminal emulation connection settings

To set up a terminal emulation connection:

1 Use these settings:

• 19.2k baud

• 8 data bits

•No parity

• 1 stop bit

• no flow control

2 To test the connection, from an NNOS command prompt, issue an airping command, or

the NNOS command of your choice.

Setting up Telnet access

To set up your system to use Telnet to access a base station:

1 Using your Term connection, at the NNOS command prompt, issue the following

command to enable Telnet:

set telnet state enabled

2 If you want to change the default port on which the Telnet server listens:

set telnet port

{portnumber}

The factory default is 23.

5-32 Configuring, Installing, and Using Carrier Infrastructure

3

To set the IP address, or range of IP addresses, of the remote computers that are allowed
to use Telnet to access the base station:

set telnet remote

{IPaddress | IPaddress mask}

where:

IPaddress is the IP address of the computer that is allowed to use Telnet to access the base
station.

IPaddress mask is a mask for a range IP addresses that are allowed to use Telnet to access
the base station.

4 If you want to change the Telnet timeout from the factory default of 5 minutes:

set telnet timeout

{time}

where {time} is the time, in seconds, that the Telnet session is allowed to sit idle before the
session ends.

5 Before you can telnet to the base station, you need to set the base station’s IP address.

a To set the base station’s IP address, at a NNOS prompt, type:

set IP address

{IPaddress}

where:

IPaddress is the IP address of the base station.

b To determine the base station’s address, use Terminal emulation over a serial line

connection to the base station. At a term connection’s NNOS prompt:

show IP address

Remember the base station’s IP address. You will need it later if you want to use Telnet
a web browser, or SNMP session to configure or monitor the base station.

Note: If you have assigned names to your base stations, you can also use the “show name”
command to determine the base station’s name. Then, you can telnet to the base station
using its name. For further information, refer to the section “Recommended parameter
changes” on page 5-40 in this guide.

6 For changed settings to take effect, you must write the changes to Flash memory and then

restart the base station.

a At the NNOS command prompt, type

b At the next NNOS command prompt, type

Setting up SNMP access

This section describes how to set up your base station for SNMP access.

Note: To determine how parameters are currently configured, issue a “show” command for
the parameter you want to check. For example, a “show snmp state” command will tell you if
the base station already has the SNMP agent enabled. Most of the system’s default settings for
parameters will help ensure your base station is ready for SNMP access when the factory
ships the base station.

write

.

reboot

.

To setup your system for SNMP access:

1 Using a Term or telnet connection, at the NNOS command prompt, issue the following

command to enable SNMP:

5-33

set snmp state enabled

2 To specify the IP address of the remote computer or computers allowed to access the

SNMP server on the base station, specify a mask appropriate to your network. Type the
following command:

set snmp remote

{IPaddress | IPaddress mask}

where:

IPaddress is the address of the remote machine that is allowed to access the SNMP server.

IPaddress mask is a mask for a range of all IP addresses that are allowed to access the base

station’s SNMP server.

3 If you want to use SNMP traps:

set snmp traps enabled

4 To specify the IP address of the SNMP trap server on the network management

workstation:

set snmp trap server

{IPaddress}

where {IPaddress} is the IP address of the machine to receive SNMP traps.

5 Specify the trap level for the functions whose traps can be reported. To specify the level of

the SNMP trap messages that are sent to the trap server:

set snmp

{function}

traplevel

{variable}

where:

{function} is the feature whose trap level you want to set. Functions you can specify include

airlink, config, nnmgr, reg mgr, relay

{variable} is the trap level, with a value of

, and

0, 3, 4, 5

stack

.

, or 7.

For more information, refer to the guide “Using the NextNet Operating System
(NNOS).”

5-34 Configuring, Installing, and Using Carrier Infrastructure

6

Specify the SNMP community name. A community is a logical relationship between an
SNMP agent and one or more SNMP managers. The community has a name, and all
members of a community have the same access privileges.

To specify the community that will have read privileges:

set snmp read community

{name}

To specify the community that will have write privileges:

set snmp write community

{name}

For both parameters, {name} specifies the name of the community.

7 To allow the ability to configure parameters through SNMP access:

set snmp access enabled

8 If you changed the settings for the set snmp state, write your changes to Flash memory

and then restart the base station.

a At the NNOS command prompt, type

b At the next NNOS command prompt, type

write

.

reboot

.

Configuring SNMPc 5.0 for use with Expedience base
stations

If you are using the network management application SNMPc 5.0 from Castle Rock, change
the default community name of base stations.

1 Open the SNMPc 5.0 application and select a base station.
2 Within the application, use the set community command to set the base station’s

community name to “public”.

Note: The default community name is netman.

3 Repeat step 2 for each base station you want to manage.

Setting base station configuration parameters

This section describes configuration parameters to set for proper base station operation.

You can use terminal emulation, Telnet, the web interface, or an SNMP session to configure
the parameters on the base station.Before you can use these methods, make sure the
connection is set up. For further information, refer to the section “Setting up connection
methods used to configure base stations” on page 5-32 in this guide.

To set up the base station:

1 Set the following parameters, in the order that follows:

• set airlink channel, as described on page 5-36 in this guide.

• set airlink downlink power, as described on page 5-36 in this guide.

• set airlink downlink bias, as described on page 5-37 in this guide.

• set vlan legacy id, as described on page 5-40 in this guide.

• set vlan mgmt id, as described on page 5-40 in this guide.

• set airlink state, as described on page 5-39 in this guide.

5-35

For more information about these configuration parameters, as well as a full list of
configuration parameters, refer to the guide “Using the NextNet Operating System.”

2 After setting the parameters, use the write command to write the settings into the flash,

non-volatile memory.

3 For changes to take effect, perform one of the following:

• Re-boot the base station

—OR—

• Power down the base station, and then re-power it.

set airlink channel

Set this configuration parameter to the frequency channel on which to run the airlink. For an
illustration of the channels that are supported in the various frequency ranges, refer to
Appendix B.

Example: set airlink channel 15

This parameter has changed to radio frequency, has it not?

set airlink downlink power

This parameter specifies the base station’s transmit power level.

The power levels you can specify depend on the type of base station you are using: a 2 watt
base station, or a 5 watt base station.

2 watt base station

Specify a power value from 10 to 31.

The maximum system power level is 10, which specifies +33 dBm (2 watts). The other power
levels are measured in 1 dB steps down from the maximum.

Example:

Table 5.1 Transmit power levels

Power value Power level

10 +33 dBm = 2.0 watts

.
.

13 +30 dBm = 1.0 watt

.
.

16 +27 dBm = 500 milliwatts

.
.

23 +20 dBm = 100 milliwatts

.
.

31 +12 dBm = 15.8 milliwatts

set airlink downlink power 10

5-36 Configuring, Installing, and Using Carrier Infrastructure

5 watt base station

Specify a power value from 6 to 31. The maximum system power level is 6, which specifies
+37 dBm (5 watts) at the RF connector. The other power levels are measured in 1 dB down
steps from the maximum.

To operate the base station at the 5 watt level, you must install a supplied channel filter.

Example:

Table 5.2 Transmit power levels

Power value Power level

set airlink downlink power 10

6 +37 dBm = 5 watts

7 +36 dBm = 4.0 watts

8 +35 dBm = 3.1 watts

9 +34 dBm = 2.5 watts

10 +33 dBm = 2.0 watts

.
.

13 +30 dBm = 1.0 watt

.
.

16 +27 dBm = 500 milliwatts

.
.

23 +20 dBm = 100 milliwatts

.
.

31 +12 dBm = 15.8 milliwatts

set airlink downlink bias

This parameter specifies the portion of airtime (slots) available for use on the downlink
relative to the airtime for the uplink. There are always at least 6 slots available for the uplink.

The higher the bias, the more bandwidth is available for the downlink, due to more time
allocated to the downlink.

Example: set airlink downlink bias 2

You must specify the same downlink bias for all base stations in a cell. Likewise, all base
stations within your system, regardless of the cell they are in, must have the same downlink
bias.

Note: If you are using both 4-QAM only RSUs and AMOD RSUs, do NOT use bias 1.

5-37

Table 5.3 describes the downlink rates for various modulation methods for 6 MHz channel
bandwidths.

Table 5.3 Downlink rate based on modulation method

4-QAM 16-QAM 64-QAM 16-QAM lite

Bias Downlink rate Downlink rate Downlink rate Downlink rate

0 1,337,358 2,100,580 2,863,803 3,627,025

1 1,719,413 2,975,037 4,230,661 5,486,284

2 2,127,308 3,906,987 5,686,667 7,466,347

3 2,294,515 4,288,741 6,282,967 ---

4 2,424,466 4,587,929 6,750,392 ---

5 2,530,766 4,828,640 7,126,514 ---

Table 5.4 describes the uplink data rate when 4-QAM (QPSK) is the modulation method.

Table 5.4 Uplink data rate for 4-QAM modulation method

Bias Uplink all 1 slot 2 slot

0 1,314,152 210,264 431,545

1 1,080,996 172,959 354,981

2 835,728 133,716 274,439

3 735,804 117,729 241,625

4 657,076 105,132 215,772

5 593,488 94,958 194,891

Table 5.5 describes the uplink data rate when 16-QAM is the modulation method.

Table 5.5 Uplink data rate for 16-QAM modulation method

Bias Uplink all 1 slot 2 slot

0 2,867,241 438,051 926,489

1 2,358,537 360,332 762,112

2 1,823,407 278,576 589,196

3 1,605,391 245,268 518,749

4 1,433,620 219,025 463,245

5 1,294,883 197,829 418,415

Table 5.6 describes the uplink data rate when 64-QAM is the modulation method.

Table 5.6 Uplink data rate for 64-QAM modulation method

Bias Uplink all 1 slot 2 slot

0 3,942,456 584,068 1,260,876

1 3,242,988 480,443 1,037,172

2 2,507,184 371,435 801,847

3 2,207,412 327,024 705,974

4 1,971,228 292,034 630,438

5 1,780,464 263,772 569,428

5-38 Configuring, Installing, and Using Carrier Infrastructure

Table 5.7 describes the uplink data rate when 16 QAM lite is the modulation method

Table 5.7 Uplink data rate for 16-QAM lite modulation method

Bias Uplink all 1 slot 2 slot

0 5,256,608 750,944 1,661,571

1 4,323,964 617,712 1,366,777

2 3,342,912 477,559 1,056,668

3 --- --- ---

4 --- --- ---

5 --- --- ---

set system location

This parameter defines the zone to which the base station belongs.

During the design of the network, the access provider defines zones of coverage for the
network. For example, an access provider can divide a metropolitan areas into North, South,
East, West, and Central zones.

In the North zone, the network access provider decides to install three base station cells. All
base stations in this zone—regardless of their cell assignment—have the same zone name of
North.

The network access provider then assigns base stations to a specific zone by using the set
system location command.

Example: set system location North

set system name

The parameter specifies the name of the base station.

For example, the network access provider has three base station cells in the zone called
North. All base stations in this zone—regardless of their cell assignment—have the same
zone name: North.

Using the system name, the network access provider provides a name for each base station.
This system name reflects where the base station is installed in the North zone.

To continue the example, a base station assigned the zone name of “North” is to be installed
near the intersection of 7th street and Randolph avenue. The base station is given the name
sevenandrandolphbase2. This name indicates that this is the second base station installed near
the street. Another base station (also in the North zone) is to be installed near the intersection
of Carmody drive and 45th avenue. It is given the name carmodyand45base1.

Example: set system name SevenandRandolphBase2

set airlink state

This parameter enables the airlink.

After you specify the set airlink channel number, set airlink downlink power, and set
downlink bias parameters, set the airlink state to enabled, so changes can take effect.

Example: set airlink state enabled

You can take the base station off the air by disabling the airlink.

5-39

Recommended parameter changes

Before deploying a base station, it is recommended that you assign the base station a cell
name and a sector name.

set system cell

This parameter specifies the cell name in which the base station is installed.

Example: set system cell RiverBendRoad

set system sector

This parameter specifies the sector in which the base station is installed.

Example: set system sector north

set DHCP state

If you want to use a DHCP server to assign IP addresses to base stations, set this parameter
to enabled.

Example: set DHCP state enabled

Setting legacy and management VLAN IDs

When the base station is shipped from the factory, the identification numbers for the legacy
VLAN and for the management VLAN are both set to 1.

If you or your ISPs use only CPEs that run Version 2.x software code or later, you do not
need to change the default id for either VLAN.

However, if you have some CPEs running version 1.x code, you need to set up a legacy
VLAN with an identification number different from the management VLAN ID. The legacy
VLAN then services all CPEs that run version 1.x software code.

set vlan legacy id

This command specifies the identification number for all legacy CPEs—CPEs that run
version 1.x software code. Make sure the legacy VLAN configuration setting is identical on all
base stations in the network.

Example: set vlan legacy id 4

set vlan mgmt id

This command specifies the identification of the management VLAN. The management
VLAN is used for network management. It also handles authorization protocol messages. All
base stations attach to the management VLAN. A network access provider must have one
management VLAN. The VLAN identification number must be the same number on all base
stations in the network.

Example: set vlan mgmt id 1

5-40 Configuring, Installing, and Using Carrier Infrastructure

Setting up Syslog

This section describes how to set up Syslog options. Syslog is a tool that records operational
data, unusual system occurrences, system commands, and messages. To set up your system’s
Syslog options:

1 To enable Syslog, use a command line interface run over the network (such as telnet) or

use a serial line connection to the base station.

2 At an sNNOS command prompt, issue the following command to enable Syslog:

set syslog state enabled

3 Specify the level for the functions whose syslog events can be reported. To specify the

level of the messages:

set syslog

{function}

level

{variable}

where:

{function} is the feature whose level you want to set. Functions you can specify include

airlink, config, nnmgr, reg mgr

{variable} is the level, with a value of

, and

relay

.

0, 3, 4, 5

, or 7.

For further information about the functions and Syslog levels, refer to the guide “Using
the NextNet Operating System (NNOS).”

4 To set the Syslog port number:

set syslog port 514

5-41

5 Set the Syslog server to the address of the network management workstation

set syslog server

where {IPaddress} is the address of the workstation that is running the Syslog application.

6 To verify the operation of Syslog, open the Syslog server, where you can view messages or

create Syslog message reports.

{IPaddress}

Configuring the authority that grants network access
to CPEs

This section describes how to set up a system component (called an authority) that grants
CPEs the ability to access the ISPs’ VLANs.

Table 5.8 describes the methods the network can use to grant network access to CPEs.

Table 5.8 Methods used to grant CPEs access to ISPs’ VLANs

Type of authority Description

Remote authority The ISP’s provisioning server resides on the ISP VLAN and is

used to grant network access to CPEs.
When the base station is configured to use remote authority, the

CPE’s network access request travels to the base station. The
base station then forwards the request to the network access
provider’s AP server. The AP server relays the request to the
proper ISP and the provisioning server.

The provisioning server is checked to ensure the CPE is
allowed to access the ISP’s VLAN. If so, the provisioning
server sends a record that grants access back to the base station.

Local authority The base station grants network access to CPEs. When this type

of authority is used, all CPEs are placed on the same VLAN,
which is the legacy VLAN.

Note: The AP server, which acts to relay CPE service requests to the proper ISP VLAN, is
sometimes referred to as an AAA (“authentication authorization accounting” or “triple A”)
server.

Using base station caching feature for re-registering CPEs

Network access providers can also set up the base station to grant access to CPEs that have
already been granted permission to operate on the network. When a CPE re-registers, the
base station uses the existing parameters stored on the base station, such as the CPE’s VLAN
assignment and the number of hosts the CPE is allowed to service. For more information on
this feature, refer to “set aaa cache” in the guide “Using the NextNet Operating System
(NNOS).”

Remote authority: setting up the provisioning server to grant
CPEs network access

Under remote authority the provisioning server grants CPEs network access. All requests for
access are relayed to the appropriate ISP through the network access provider’s AP server.

To set up remote authority:

5-42 Configuring, Installing, and Using Carrier Infrastructure

1

Contact the appropriate ISP to make sure the provisioning server hardware and software
are properly installed.

2 Add appropriate routes to the base station’s routing table.

Use the NNOS “route add” command to add a route (from the base station to the AP
server), and a reverse route (from the AP server to the base station) to the base station’s
route table.

Note: Steps 3 through 6 help you configure the base station to use the AP server as a relay
for CPE registration requests. The AP server forwards the registration requests to the
appropriate provisioning server. To complete these steps, use Terminal emulation and a
serial line connection to the base station. You can also use Telnet, SNMP, or web access if
access for these connection methods is configured.

3 To specify the address of the AP server that receives records:

set aaa server address

{IPaddress1},{IPaddress2}

where

{IPaddress1} is the address of the workstation that runs the AP server.

{IPaddress2} is the address of a redundant workstation that runs the AP server if the
workstation identified by IPaddress1 goes down. Control returns to the workstation
identified by IPaddress1 when the redundant workstation goes down.

4 To specify the port on which the AP server listens:

set aaa port 12451

5 Configure the method the base station uses to grant network access to CPEs:

set aaa authority remote

where

remote

indicates the provisioning server (through the AP server relay) grants

network access to CPEs that are attempting to connect to the network.

6 To activate the AP server feature:

set aaa server enabled

7 To store the changes in Flash memory:

write

Local authority: setting up the base station to grant CPEs
network access

If you establish local authority, the base station always grants CPEs network access. All CPEs
are placed on the same VLAN, which is the legacy VLAN.

To set up local authority:

1 Disable the AAA server feature:

set aaa state disabled

2 Configure the method the base station will use to grant network access to CPEs:

set aaa authority local

where

local

indicates the base station grants access to CPEs that want to connect to your

network.

3 To store the changes in Flash memory:

write

5-43

4 Reboot the base station. When the CPEs re-register with the base station, the base station

places them on the legacy VLAN.

Configuring the time signal used by base stations

Expedience base stations require a time synchronization signal in order to determine the
proper timing for time division duplexing (TDD).

Because most Expedience system deployments use multiple base stations, at multiple cell
sites, most service providers will configure their base stations to use the time synchronization
signal generated by the Expedience system’s global positioning system (GPS).

However, if your deployment includes only one base station or one cell site, you can disable
the use of an external GPS. Your base station will then use a time signal generated by the base
station itself or another base station in the cell for time synchronization.

The GPS supplied time signal is known as an external time signal, which is the default setting
of the base station when shipped from the factory.

The base station generated time signal is known as an internal time signal.

Configuring the GPS to supply the time signal

To use the GPS to supply the time signal to base stations:

1 Supply power to the entire system, as described in the section “Powering base stations” on

page 6-61 in this guide.

2 Connect the GPS to a base station, as described in the section “Connecting the GPS

equipment to a base station” on page 6-59 in this guide.

3 Connect all base stations in your cell to each other, in a daisy chain manner. For further

information, refer to the section “Connecting the GPS equipment to a base station” on
page 6-59 in this guide.

4 Configure the base station to use an external time synchronization signal:

set airlink timing external

5 Save changes in Flash memory by issuing the
6 For changes to take effect, reboot or reset the base station’s power. To reboot, type the

following at the command prompt:

reboot

write

command.

Configuring a base station to supply a time signal

There are two scenarios in which you might want to set up a base station to use internal time
synchronization.

The first is a single base station at a cell that is not part of a larger system with other sites.
This base station may be set to use internal time synchronization.

The second scenario is a multiple base station site that is not part of a larger system with other
sites. One of the base stations is set as a master base station. The master base station is set for
internal time synchronization. It generates the 1-pulse-per-second (pps) for itself, and also
outputs the 1 pps pulse for the other base stations. As such, you then set the other base
stations to use external time synchronization.

To use a base-station generated time signal:

5-44 Configuring, Installing, and Using Carrier Infrastructure

1

Connect all base stations in your cell to each other, in a daisy chain manner.

2 Supply power to the entire system, as described in the section,“Powering base stations” on

page 6-61 in this guide.

3 Configure the single base station or the master base stations to use an internal time

synchronization signal:

set airlink timing internal

4 Disable the set airlink afc parameter. You must disable this parameter, which otherwise

would allow a base station to automatically frequency lock to the external pulse from the
GPS.

set airlink afc disabled

5 Store your changes in Flash memory by issuing the
6 For changes to take effect, reboot or reset the base station’s power. To reboot, type the

write

command.

following at the command prompt:

reboot

5-45

5-46 Configuring, Installing, and Using Carrier Infrastructure

5-47

5-48 Configuring, Installing, and Using Carrier Infrastructure

I

Chapter overview

This chapter describes how to install the integral base transceiver station (BTS). The base
station enables you to install the base station and the antenna as one item, which could save
tower rental costs. You can also install the base station and antenna separately, if desired.

C HAPTER

6

NSTALLING THE INTEGRAL BASE

TRANSCEIVER

STATION

This chapter describes:

• Components used to mount the base station on a building or tower

• Connecting the base station to the cell and to cell-site components

Before you begin

Before you install a base station on a roof top or tower:

• It is recommended that you assign a name to the base station. For more information refer
to Chapter 2, “Configuring base stations‚” in this guide.

• It is also a good idea to configure the base station.

6-49

Cell wiring

Figure 6.1 shows how a cell, base stations, and ancillary equipment are wired together.

Figure 6.1 Cell wiring diagram

GPS unit

Panel antenna

GPS Interface
cable

GPS inter-base
station cable

Ethernet/power
cable

TVS
module

1 2 6

Load
Termination

Coax jumper

Coax - main feed

Coax jumper

Base statio n

Optional serial
connection and
laptop computer

Ethernet
cable

Backbone swtich Power supply

Backbone
connection cable

UPS

AC power cord

6-50 Configuring, Installing, and Using Carrier Infrastructure

DC power cable

Installation overview

To install a base station as a single unit:

1 Attach the straight end of the antenna cable to the antenna connector on the base station

and tighten. Apply weatherproofing tape to the connector.

2 If you want to install the base station and antenna as a single unit, use the antenna bracket

integral base kit (part number 123-0350-1002) to attach the necessary brackets to the base
station and antenna.

a Determine the degree of tilt you need. This determination impacts which holes on the

various brackets you will use.

b Attach the lower antenna mounting brackets to the bottom bolts on the antenna.

c Attach the other antenna mounting brackets to the base station.

d Onto the bottom of the base station, attach the other end of the bracket that was

attached to the antenna in step a.

3 Attach the right-angled end of the antenna cable onto the connector on the antenna. Apply

weatherproofing tape to the connector.

4 Install the base station to the tower, pole, or wall.

a If you are installing the antenna separately from the base station, hang each piece on the

tower.

b If you are using a pole to install the base station, attach the pole mounting bracket to the

back of the BTS.

5 On the bottom of the base station:

• Attach the serial cable

• Attach the GPS cables

• Attach the Ethernet/power cable

6 Connect to the backbone network.
7 Ground the base station.
8 Power the base station.

These steps are explained in greater detail in the sections that follow.

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Installing the antenna and base station as a single
unit

Figure 6.2 provides an overview of the assembly. Specific assembly illustrations accompany
the detailed installation steps in the sections that follow.

Figure 6.2 Overview of entire antenna-to-BTS assembly

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Attaching antenna cable to base station

To attach the antenna cable to the base station:

1 Attach the straight end of the antenna cable to the filter on the base station.
2 Apply weather proofing tape to the connector.

Figure 6.3 Attaching antenna cable to base station

Note: For further information about the antenna connection, refer to “Connecting the
antenna to the base station” on page 6-73 in this chapter.

Determining the degree of tilt for the antenna

You can tilt the antenna downward or upward. To do so, you install the antenna mounting
brackets using the appropriate holes on the various brackets.

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The brackets illustrated in Figure 6.4 help to alter the antenna tilt.

6-54 Configuring, Installing, and Using Carrier Infrastructure

Figure 6.4 Brackets which help set antenna tilt

8 degrees downtilt

Each mark represents 1 degree tilt

0 degrees downtilt (no tilt)

Also, default installation position for
uptilt

Installation position for 2 degrees uptilt

Default installation position for no tilt or downtilt

Default installation position for no tilt or downtilt

Installation position for 2 degrees uptilt

Installation position for 2 additional degrees uptilt

6-55

Attaching lower antenna brackets to bolts on lower sides of
antenna

Attach the antenna brackets to the bolts on the left and right side of the antenna
(Figure 6.5). You must attach these brackets to the antenna bolts before attaching the
brackets to the base station.

Attach the bracket to the rear set of bolts on the antenna. The front bolts are NOT used
when installing the antenna onto the base station.

Figure 6.5 Bracket on antenna bolt

1 Attach the L-shaped brackets (MP2) to the upper left and right of the base station (see

Figure 6.6). You must attach these brackets first, so that your wrench can access the
screws holding the bracket to the base station.

Figure 6.6 Attaching L-shaped brackets to base station

MP2

Top of base station

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2

Attach the antenna bracket (MP4) to the L-shaped bracket (see Figure 6.7) To tilt the
antenna upward by 2 degrees, use the top set of holes to attach the antenna bracket to the
L-shaped bracket.

Figure 6.7 Attaching antenna bracket to the L-shape bracket

MP4

Top holes provide 2 degrees antenna uptilt

3 Attach the tilt guide bracket to the bracket on the antenna (see Figure 6.8):

a Align the holes on the side of the bracket with the holes on either side of the antenna’s

bracket.

b Insert a bolt through each hole, and tighten a nut and washer on each bolt to hold the

tilt guide bracket to the antenna.

Figure 6.8 Attaching tilt guide bracket to the bracket on the antenna

Top of antenna

4 Attach the tilt guide bracket (MP3) to the antenna bracket.Make sure the domed-side of

the washer faces the nut.

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Figure 6.9 Attaching tilt guide bracket to antenna bracket

Top of antenna

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5

Attach the antenna brackets to the bottom left and right sides of the base station.

If you want to tilt the antenna upward, use the middle or lower holes on the bracket.

• The second set of holes tilts the antenna 2 degrees upward.

• The third set of hole provides an additional 2 degrees of uptilt.

Figure 6.10 Antenna brackets on bottom left and right sides of base station

Top single hole for no tilt or downtilt

Top hole set
Downtilt or
No tilt

Middle holes

2 degrees
uptilt

Bottom holes
2 additional degrees uptilt

6 Tighten all hardware.

Mounting the base station

You can mount the base station to a wall, a pole or a rack.

Mounting the base station to a wall

To mount the base station to a wall:

1 Find a surface suited to base station installation.

a Use installation kit 123-0100-0130 to install the base station to a wall or back board. The

kit supplies a bracket and hardware that are necessary to mount the base station.

b Plan to install the base station vertically, so the antenna connector is at the top (facing

skyward), and the other circular connectors are at the bottom (facing the ground).

6-59

c Make sure the area above and below the location where you want to install the base

station has a good distance for clearance. This clearance allows for proper air circulation
and heat flow from the heat sink fins on the back of the base station. The clearance also
allows for the coaxial cable and the other cable connections.

2 Drill mounting holes into the surface, according to the dimensions shown in Figure 6.11.

Figure 6.11 Base station mounting template

10.375”

13.00"

3 To attach the base station to a wall, use the mounting brackets. Install them on the base

station first, then attach the brackets to the wall. To attach the brackets to the base station,
use 5/16 inch x 18 inch UNC thread bolts and a lock washer which are supplied in the
installation kit. Use the optional bolts to then attach the bracket to the surface.

Mounting the base station to a pole or tower

Use the pole mounting kit (part number 123-0350-1010) to mount the BTS to a pole. Once
the BTS is installed on a pole, you can attach the pole to a tower, if desired.

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Figure 6.12 shows an overview of how to attach the BTS to the pole mounting bracket.

Figure 6.12 Overview of entire BTS pole mounting bracket assembly

To mount the base station on a tower:

1 Attach the pole mounting bracket to the base station and to the pole.
2 Install the pole and attached base station onto the tower.

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Attaching mounting clamps to base station and around
pole

The pole mounting kit (part number 123-0350-1010) contains the hardware needed to mount
the base station to a pole.

• 2 front clamps (MP2)

• 2 back clamps (MP1)

• 4 threaded rods

• 4 large flat washers

• 4 small flat washers

• 4 large lock washers

• 4 small lock washers

•4 nuts

In addition to this hardware, you also use the 4 bolts that are pre-installed in the base station’s
4 legs (2 at top corners, 2 at bottom corners).

To install the pole mounting brackets to the base station and pole:

1 Remove the 4 bolts that are pre-installed on the base station.

Figure 6.13 Location of bolts on the back of the base station

Remove pre-installed bolts
from 4 corners of BTS

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2

Slip a small flat washer and small lock washer on the end of each bolt, then loosely re­install the bolts into the 4 corners of the base station.

Note: Do NOT tighten the bolts into the base station fully. You will tighten the bolts in step
4, after you have hung the bolts, and therefore the attached base station, in the slots of the
top mounting clamp.

3 Install the top mounting clamps (brackets) around the pole

Figure 6.14 Pole mounting clamps MP2 and MP 1

MP2 clamp (front clamp,

close to base station)

a Insert the threaded rods through the MP2 clamp.

MP1 clamp (back clamp)

6-63

b Insert the threaded end of the rod through the corresponding opening on the MP1

clamp.

Figure 6.15 Threaded rod assembly, top clamp

Step 3a

Step 3b

Step 3c

c Assemble a large washer, large lock washer and nut around the threaded end of the rod.

Tighten the nut.

4 Hang the base station on the TOP clamp, using the slots in the MP2 clamp.

Figure 6.16 MP2 top pole clamp, slots used to hang base station

Slots used to hang base station

a Make sure the flat washers, lock washers, and bolt are behind the clamp bracket.

b Tightly fasten the bolts into the base station, in order to securely hold the base station to

the bracket.

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5

To install the bottom mounting brackets around the pole:

a Repeat steps 3a through 3c for the bottom set of clamps, threaded bolts, washers, lock

washers and nuts.

Note: To more easily shimmy the bottom bracket up the pole, fully install the left-most
threaded bolt, but leave the right most bolt loose. Once the bracket is in place, slide the bolt
through the side slot opening, then tighten the bolt using the washer, lock washer and bolt.

b To hold the base station tightly into the bottom MP2 clamp, make sure the base stations

flat washers, lock washers, and bolt are behind the clamp bracket.

c Tightly fasten the bolts into the base station, in order to securely hold the base station to

the bracket.

6-65

Mounting the base station to a 19 inch rack

Base stations can be mounted to a 19 inch relay rack. Typically, NextNet Wireless stages this
rack for customers as a service.

Figure 6.17 Base stations installed on rack

After staging, the base stations are mounted in the rack and wired to the TVS modules, the
power supply, the backbone switch, and grounding plate.

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If you desire to stage your own relay rack, you must use two 19 inch brackets (part number

r

350-0100-0101) and at least one grounding plate (part number 30-0100-0020).

Base station connectors

Figure 6.18 shows the connectors that the base station supports.

Figure 6.18 Base station connectors

Antenna connector

J4—Serial connector (green)
J3—GPS connector (black)
J2—GPS connector (black)
J1—Ethernet/power connecto

(orange)

Ethernet (data) and power connector

On the base station, the Ethernet/power connector is orange.

The Ethernet and power connector supplies data and DC power to the base station. The
connector to the TVS module has 8 pins:

• Ethernet transmit uses 2 pins.

• Ethernet receive uses 2 pins.

• Power V- uses 2 pins.

• Power V+ uses 2 pins.

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Figure 6.19 shows the Ethernet and power connector which plugs into the TVS module.

Figure 6.19 Ethernet (data) and power connector

1

2

8

3

7

6

5

4

The connector to the base station has 13 pins.

Figure 6.20 Ethernet (data) and power connector

1

10

2

13

9

8

11

7

6

3

4

12

5

Ethernet/power connecting cable

Depending on your needs, you can order any of the following cables to connect the base
station to the TVS module.

Table 6.1 Ethernet/power base station cable choices

Cable part number Length (feet)

597-6027-0002 2

597-6027-0004 4

597-6027-0006 6

597-6027-0010 10

597-6027-0025 25

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Table 6.1 Ethernet/power base station cable choices

Cable part number Length (feet)

597-6027-0050 50

597-6027-0100 100

597-6027-0200 200

597-6027-0300 300

Table 6.2 describes the pins of the Ethernet/power cable that connects the base station to the
TVS device.

Table 6.2 Ethernet/power cable pins

Pin TVS connection Base connection

1 Tx+ -48 VDC

2 Tx- -48 VDC

3 Rx+ +48 VDC

4 Rx- +48 VDC

5+48 VDC Rx-

6+48 VDC Rx+

7 -48 VDC not used

8 -48 VDC not used

9Tx-

10 Tx+

11 not used

12 not used

13 not used

Table 6.3 describes the color and function of the wires in cable 597-6027-0xxx.

Table 6.3 Function of wires in cable 59 7-6027-0xxx

Wire color Wire function

White/orange Tx+ Ethernet

Orange Tx- Ethernet

White/green Rx+ Ethernet

Green Rx- Ethernet

Red +48 VDC

Red/white +48 VDC

Black -48 VDC

Black/white -48 VDC

TVS module connectors

The TVS module has connectors on both its right and left sides.

6-69

Base station to TVS connector

The base station connector supplies power and an Ethernet connection to the base station.
Connect cable 597-6027-0xxx to this side of the TVS module.

Figure 6.21 TVS module connector: Base station connector

ISP

ETHERNET

+48 VDC

POWER

+-

Note: Use the AUX +48 VDC and AUX ETHERNET connections only if you need to cut
off the circular connector from the power/Ethernet cable (597-6013-0xxx). For example, you
might not be able to use the circular connector if it cannot fit through a space or hole in a wall
at the installation site. Instead, you may split the cable and put a 4 position .150" spaced
terminal block on the Ethernet wires, and a 4 position .200" spaced terminal block on the
power wires. Then, you will plug the appropriate connector from the split cable into the
corresponding connector in the TVS module. Table 6.3, “Function of wires in cable 597­6027-0xxx” on page 6-69 describes the wires in the cable.

Power supply cable and ISP Ethernet network connector

The other side of the module has a connector for both an Ethernet cable coming from your
ISP network and for the +48 VDC power coming from a power supply.

Note: To ensure your base station is properly protected from possible lightning strikes,
ensure you plug the power cable coming from your power supply into this connector in the
TVS module. If you plug the power cable into the base station connector side, the base
station will power up, but you will not be properly protected against possible lightning strikes.

Figure 6.22 TVS module connector: power/Ethernet connector

ISP

ETHERNET

+48 VDC

POWER

+-

Connecting power cable to green TVS module connector

To connect the power cable to the TVS module:

1 Cut the power cable to the desired length.
2 Insert the wires into the appropriate opening on the green TVS module connector.

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3

Screw down the wires using the screws on the top of the connector.

Figure 6.23 Connecting power cable to TVS module

GPS connectors

On the base station, the GPS connectors are black.

The base station supports two GPS connectors: one connector is used to supply the GPS
signal, either by a direct connection to the GPS device, or by a daisy chain connection to
another base station in the cell. The other GPS connector is used to make a daisy-chain
connection from the current base station to the next base station.

Figure 6.24 GPS connector

A

F

E

D

B

G

C

An RS-422 line feeds 1PPS+ and 1PPS- with the time synchronization pulse from the GPS
equipment to the base station.

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An RS-422 line also feeds 422Data+ and 422Data-, to allow data communication from the
GPS device to the base station. This is one-way communication, with the GPS device giving
the base station time information.

The 18V+ and ground pin supply power to the GPS device from the base station. The GPS
device uses 18 volts DC at 150 milliamperes.

Note: If you move the GPS receiver after supplying power to the GPS, you must reconfigure
the receiver using the Trimble synchronization kit.

GPS connecting cable/Inter-base station connecting
cables

You need one GPS device per cell. You then directly connect one base station within that cell
to the GPS device. Next, the other base stations are connected to each other, using a daisy
chain wiring scheme, so that all base stations in the cell can receive a GPS signal.

You can choose the length of the cable that connects the base station to the GPS receiver.

Table 6.4 GPS kits and cables

GPS kit part number Length of GPS cable

250-0150-0200 GPS system 200’

250-0150-0100 GPS system 100’

250-0150-0050 GPS system 50’

250-0150-0025 GPS system 25’

250-0150-0010 GPS system 10’

NOTE: The GPS kits listed in this table are for use with AMOD BTSs.

You can also choose the length of the daisy-chain cable that connects one base station to
another base station.

Table 6.5 Daisy chain cable choices

Part number Cable length

597-6026-0200 200 ft

597-6026-0100 100 ft

597-6026-0050 50 ft

597-6026-0025 25 ft

597-6026-0010 10 ft

597-6026-0004 4 ft

NOTE: The daisy chain cables listed in this table are for BTSs with the AMOD
feature.

• If you need to remove a base station for service, you can a longer cable to jumper the GPS
cables together, and continue cell operation.

The last base station in the daisy chain requires a load termination to be connected to the
GPS connection. This base terminator plug is 100 ohm (part number 515-6005-0001).

Serial interface connector

On the base station, the serial interface connector is green.

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For base station configuration, the serial interface connector lets you directly connect the
base station to a computer. The seven-pin connector is an RS-232 cable (10 ft.), physical
interface.

Figure 6.25 Serial interface connector

A Ground

B Not used

C Not used

D Not used

E Tx data

F Rx data

G Not used

Serial interface connecting cable

Cable 597-6028-0010 has a female, circular connector on one end, and a DB-9 female
connector on the other end. Plug the DB-9 end of the cable into a computer. Plug the other
end of the cable into the serial interface connector.

Antenna connector

The antenna connector is a type N female connector. It has a built-in, internal 1/4 wave
lightning protector. Connect the base station to the antenna using a coaxial cable. Connect
the proper lightning ground wiring to the antenna lightning protector.

Connecting the antenna to the base station

This section provides tips you can use to connect the antenna to the base station for
installations where the antenna is not mechanically mounted to the Integrated Base Station

It also provides step-by-step instructions for connecting the components to each other.

Antenna connection tips

Use the following tips when connecting the base station to the antenna:

• You connect the antenna to the base station using a coaxial cable. The size of the cable
depends on the distance between the base station and the antenna.

• The greater the distance, the larger your coaxial cable needs to be, in order to maintain

low signal loss.

• It is recommended that you keep signal loss to a minimum. At a maximum, the signal

loss should be no more than 2 dB, including all coaxial cable and connectors.

• Use short coaxial jumpers from the base station to the main coaxial line, and from the
main coaxial line to the antenna. It is recommended you use 1/2 inch flexible line, of the
shortest length possible, while still allowing the flexibility to make a good connection.

6-73

• The base station contains an antenna connector with a 1/4 wave lightning protector. You
do not need to place an external lightning protector in the coaxial cable.

Connecting the antenna to the base station

To attach the antenna to the base station:

1 Mount the antenna according to the manufacturer’s instructions.
2 Connect one end of a short coaxial jumper to the antenna. Connect the other jumper end

to the main coaxial cable.

3 On the base station’s antenna connector, connect one end of a short coaxial jumper.

Connect the other jumper end to the main coaxial cable coming from the antenna.

4 Make sure the coaxial line is properly grounded.
5 Properly seal the co-axial connections with weatherproof components, tape and wrap.

Connecting the GPS equipment to a base station

The GPS equipment provides a time synchronization signal to the base station. This signal is
needed to ascertain the proper timing for time division duplexing (TDD).

The equipment is a smart antenna in a sealed, shielded, self-contained unit that houses a GPS
receiver, GPS antenna, and interface circuitry.

When powered, the GPS provides accurate time, with a time pulse of one pulse per second,
synchronized to Universal Time, Coordinated (UTC) within 150 nanoseconds.

For information about which GPS kit to use when installing and connecting the GPS, refer to
Table 6.4 and Table 6.5.

GPS equipment mounting tips

You must use the NextNet Wireless supplied GPS system to supply a time synchronization
signal to the base stations in a cell. You cannot use a GPS from another manufacturer.

The GPS does not ship with mounting accessories. You can obtain these accessories from
many suppliers around the world, especially distributors of marine products.

Follow these tips when mounting the GPS:

• Mount the GPS unit on a threaded pipe or pole.

• The GPS mounting socket accepts a 1.0000 x 14 straight thread. It is recommended that
the pole/pipe you use be 1.000 inch.

• Secure the pipe or pole to the building or other support structure.

• Ensure at least half of the sky is clearly visible to the unit.

• Expose the unit to the southern portion of the sky. In the northern hemisphere, GPS
satellites move generally from the southwest to the northeast.

• Mount the GPS away from potential interference sources.

Connecting the GPS unit to the base station

One GPS unit can support numerous base stations in the same cell.

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Use the GPS-to-base station cable to attach the GPS unit to one of the base stations in the
cell.

To connect the cable to the GPS unit and to the base station (both of which have already
been installed and mounted):

1 Connect the cable’s molded, circular female connector to the GPS unit.
2 After connecting the cable to the GPS unit, run the cable to the base station. Plug the

cable’s other end into the base station’s GPS connector.

3 Secure the cable that you just ran to an appropriate support structure. Coil and tie any

excess cable.

4 The GPS unit receives its power from the base station. The base station supplies power to

the GPS device, which uses 18 volts DC at 150 milliamperes.

5 So that the remaining base stations in the cell can receive a GPS signal, connect a base

station adjacent to the base station you just connected to the GPS unit. For more
information about cables that you can use, refer to Table 6.5.

Continue to use the daisy chain wiring scheme to connect the remaining base stations, until
all of the base stations within the cell are connected to each other.

On the last base station in the daisy chain, connect the load termination on the open GPS
connection.

Connecting to the backbone network

The base station connects to a TVS module. You then connect the TVS module to your
network. Typically, base stations connect to a level 2 switch at the cell site, using a 10BaseT
connection. The switch controls the base station data traffic to and from the backbone
network.

Connect the switch to the backhaul network using the appropriate cabling.

Grounding base stations

The grounding location differs depending on the type of base station you are using.

• Base stations with the ability to change their modulation method (AMOD base stations)
have a ground lug located at the top right corner.

• Base stations without the ability to change their modulation method have a grounding
connection at the base of the antenna connection.

To ground either type of base station, run a 6-gauge or larger grounding wire from this
connection to the ground bar on the rack, to the building’s ground connection on the roof, or
to the grounding location at the tower.

The ground to which you connect the base station should be 6 ohms or less to ground.

The 48 volt power input to the base station is floating, so either the positive or negative can
be grounded.

Powering base stations

This section describes tips for powering base stations, as well as the component connection
sequence you need to use to properly power base stations.

6-75

Powering tips

• It is recommended that you use a redundant power supply for base stations.

• Each base station requires 48 volts DC at 3.0 amps maximum.

• The ground of the power can be either negative or positive. The 48 volt power input to the
base station is floating, so either the positive or negative can be grounded.

• Power input is polarity sensitive, so be sure you connect V+ and V- properly.

• Depending on the type of equipment you own, supply power to the Ethernet switch and
backbone network equipment.

• It is recommended that you use an uninterruptable power supply (UPS).

Tips for sizing the UPS include:

• Size the voltage and amperage of the power supply according to the number of base

stations at your cell site.

• Size the UPS according to the efficiency of the DC power supplies and power

requirements of the other ancillary equipment, such as the Ethernet switch and
backbone network equipment.

• Consider the time you want to allow the system to operate on the UPS.

Powering the base station

The base station does not have a power switch. Rather, it receives its power when the UPS,
power supply, and TVS module are connected to the base station through the Ethernet/
power cable.

To connect the base station to a power supply, connect these components in the order that
follows:

1 Connect the base station to the antenna.
2 Connect the GPS to a base station, and use a daisy chain wiring scheme to connect the

other base stations.

3 Connect the base station to the TVS module using the Ethernet/power cable of the

desired length.

4 Use an Ethernet cable to connect the TVS module to the network. Use a standard DC

power cable to connect the TVS module to the power supply.

5 Connect the power supply to the UPS.
6 Connect the UPS to an AC power supply.

6-76 Configuring, Installing, and Using Carrier Infrastructure

C HAPTER

7

I

NSTALLING THE RACKMOUNT

BASE

Chapter overview

This chapter describes how to install the rackmount base station (RMB). It describes:

• Installing the cabinet onto a 19 inch rack

• Installing the power supply and switch

• Installing the RMB into the base station cabinet

• Connecting the RMBs to the cell and to cell-site components

Before you begin

Before you install RMBs:

• It is recommended that you assign a name to the RMB. For more information refer to
Chapter 4, “Configuring base stations” in this guide.

• It is a good idea to configure the base station with channel, VLAN, power, and other
parameters, as described in Chapter 4, “Configuring base stations” in this guide.

STATION

(RMB)

• It is a good idea to limit access to the room where the RMBs are installed.

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Installation overview

This section provides an overview of the tasks you will perform when installing RMBs.

To install the RMBs:

1 Install the mounting brackets to the cabinet, then attach the cabinet to the 19" rack.

Note: Do not operate the system before you have securely mounted the cabinet to a standard
19" rack that can handle the weight of the total system. To calculate the weight of your
system, note that the cabinet housing weighs 43 pounds, each base station weighs 18 pounds,
and each filter weighs 3.5 pounds.

So, if you have one cabinet, one RMB, and one filter, the weight of the total system is 64.5
pounds. Adjust this figure according to the number of RMBs and filters that you are using.

Also, remember to factor in the weight of any switches, power supplies, or similiar items that
you might want to attach to the rack.

2 Attach the power supply and switch to the rack.
3 Insert the pre-configured RMBs into the cabinet.
4 Connect the cabinet to the following components:

•Switch

•Power supply

• Antennas or antenna filters, if filters are required.

•GPS

5 Follow your company’s good grounding practices. Typically, you will ground the cabinet

bus bar and the power supply.

6 Power on the base stations.

For further information about these tasks, refer to the sections in this chapter.

7-78 Configuring, Installing, and Using Carrier Infrastructure

Installing the mounting bracket and attaching
cabinet to the 19-inch rack

Before inserting RMBs into the cabinet, attach the cabinet to the rack. To attach the cabinet
to the rack:

1 Attach a mounting bracket to the left side and right side of the cabinet using the 16

supplied screws (8 per side).

Figure 7.1 Cabinet mounting bracket

Step 1: Attach to cabinet.

Step 2: Attach to rack.

2 Attach the cabinet to the rack with the 8 supplied screws, 4 for each side.

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Attaching the switch and power supply to the rack

Figure 7.2 shows where the switch and power supply should be installed on the rack, in
relation to the cabinet and RMBs.

Figure 7.2 Location of switch and power supply in rack

RMBs

Switch

Power supply

Installing the RMBs into the cabinet

To install the RMB in the cabinet:

1 Grasp the RMB by handles on each side of the RMB.
2 Slide the RMB into the cabinet, aligning the guides along the side of the RMB with the

gliders inside the cabinet.

To ensure you align the RMB properly into the pre-installed harness connections, there is a
guide pin on the back of the cabinet that fits into a guide pin opening on the back of the
RMB. This guide pin will help the connectors on the back to align correctly.

3 When the RMB is properly installed and aligned in the cabinet, the plastic latches on the

side of the front plate snap into place.

Note: Always make sure the RMB is slid greater than halfway into the cabinet. An RMB that
is not at least halfway installed in the cabinet could fall out of the cabinet or could cause
damage to the tracks.

7-80 Configuring, Installing, and Using Carrier Infrastructure

Connecting RMBs to cell (cell wiring)

There are minimal wiring tasks for you to perform, as the RMB simply slides into the pre­existing wiring when you place the RMB in the cabinet.

The cabinet into which the RMB is installed has a pre-wired harness. This harness supplies
power and Ethernet connectivity to the RMB. After you connect the antenna to the
appropriate connector, the RMB also receives airlink traffic. Finally, the harness supplies an
alarm capability to the RMB, as well as a GPS signal.

Note: Make sure you have made all antenna connections before attempting to transmit. Do
not attempt to transmit before the antennas are connected.

Note: In earthquake zones, consider additional methods for securing the base stations in the
rack.

7-81