GE MDS P21, MDS P22, MDS P23 Installation & Operation Manual

Installation and Operation Guide

Installation & Operation Guide

MDS 05-4161A01, Rev. C

AUGUST 2007

Protected Network Stations

Equipped with MDS iNET Series, EntraNET, or Mercury Transceivers

MDS P21/P22/P23

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QUICK START GUIDE

Below are the basic steps for configuring a Protected Network Station. Detailed instructions are given in
“INSTALLATION” on Page 6.

1. Install transceivers (if not already present)

• Remove chassis cover.

• Remove the transceiver mounting plates.

• Mount the transceivers to the plates. Secure transceiver/plate assemblies to chassis. (Note that MDS
iNET/iNET-II and entraNET radios are stacked, but Mercury radios are installed side-by-side.)

• Connect internal cabling between transceivers and the Switchover Logic Board. (See “Internal
Cabling Arrangements” on Page 10.

2. Remove top cover plate and connect the internal back-up battery (if equipped). Re-install the
top cover.

• Units are shipped with the battery disconnected.

• Use care not to short the battery terminals.

• After the unit is powered up, allow several hours for the battery to fully charge.

3. Connect external wiring

• Connect chassis ground stud to facility’s Earth ground.

• Connect antenna feedline(s), data interface cabling, input power, and any alarm devices. (These
steps are explained with more detail in “External Connections” on Page 17.)

4. Program transceivers

• Programming can be performed with a PC terminal connected to the appropriate Data I/O connector
on the rear panel

• Consult transceiver manual(s) for programming details

5. Apply primary power

• Observe proper input voltage and polarity

• Verify that power supply has enough current capacity to power the chassis.

6. Select the active transceiver

• Set the front panel RADIO SELECTION Switch to A (Transceiver A, no auto switchover), B (Trans­ceiver B, no auto switchover), or AUTO (automatic switchover)

7. Verify proper operation

• Observe LEDs on transceivers

•Refine directional antenna headings for maximum signal strength

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station i

TABLE OF CONTENTS

1.0 ABOUT THIS MANUAL ............................................................... 1

2.0 PRODUCT INFORMATION ......................................................... 1

2.1 Product Features ..............................................................................2

2.2 Chassis Radio Configurations ..........................................................3

2.3 Antenna Port Configurations ............................................................4

2.4 Items Supplied .................................................................................4

2.5 Model Configuration Codes ..............................................................5

3.0 INSTALLATION ............................................................................ 6

3.1 Installation Planning .........................................................................6

3.2 Installing Transceivers—MDS entraNET, iNET/iNET-II ...................... 7

3.3 Installing Transceivers—MDS Mercury .............................................9

3.4 Internal Cabling Arrangements ......................................................10

3.5 External Connections .....................................................................17

Safety Ground...............................................................................17

Station Antenna Connection(s)..................................................... 17

Data Connections ......................................................................... 18

Alarm Equipment Connections ..................................................... 19

Primary Power Connections ......................................................... 19

3.6 Mounting the Protected Network Station .......................................20

3.7 Initial Startup .................................................................................. 21

4.0 PROGRAMMING THE TRANSCEIVERS .................................. 23

4.1 Initial MDS iNET/iNET-II Programming and Setup ......................... 23

Redundancy Configuration Menus ...............................................23

“Mirrored Configuration” of Transceivers.......................................29

4.2 Initial MDS entraNET Programming and Setup .............................30

Redundancy Menu........................................................................30

4.3 “Mirrored Configuration” of Transceivers ........................................35

4.4 Initial MDS Mercury Programming and Setup ................................ 35

Redundancy Configuration (AP Only)...........................................35

5.0 TROUBLESHOOTING ............................................................... 36

6.0 TECHNICAL REFERENCE ....................................................... 37

6.1 Field-Replaceable Assemblies and Parts ......................................37

Replacing Power Supply Modules ................................................37

Replacing Other Assemblies ........................................................37

6.2 Specifications .................................................................................38

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ii P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Copyright Notice

This Installation and Operation Guide and all software described herein
are protected by

copyright: 2007 GE MDS, LLC . All rights reserved.

GE MDS reserves its right to correct any errors and omissions in this
document.

Operational Safety Notices

The radio equipment described in this guide emits radio frequency
energy. Although the power level is low, the concentrated energy from
a directional antenna may pose a health hazard. Do not allow people to
come closer than 23 cm (9 inches) to the antenna when the transmitter
is operating in indoor or outdoor environments. More information on RF
exposure is on the Internet at www.fcc.gov/oet/info/documents/bulle­tins.

This manual is intended to guide a

professional installer to install,

operate and perform basic system maintenance on the described radio.

ESD Notice

To prevent malfunction or damage to this radio, which may be caused
by Electrostatic Discharge (ESD), the radio should be properly
grounded by connection to the ground stud on the rear panel. In addition,
the installer or operator should follow proper ESD precautions, such as
touching a grounded bare metal object to dissipate body charge, prior to
adjusting front panel controls or connecting or disconnecting cables on
the front or rear panels.

Environmental Information

The equipment that you purchased has required the extraction and use
of natural resources for its production. Improper disposal may contami­nate the environment and present a health risk due to hazardous sub­stances contained within. To avoid dissemination of these substances
into our environment, and to diminish the demand on natural resources,
we encourage you to use the appropriate recycling systems for disposal.
These systems will reuse or recycle most of the materials found in this
equipment in a sound way. Please contact the factory or your supplier
for more information on the proper disposal of this equipment.

Quality Policy Statement

We are committed to understanding and exceeding our customers’
needs and expectations.

• We appreciate our customers’ patronage. They are our business.

• We promise to serve them and anticipate their needs.

RF Exposure

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iii P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

• We are committed to providing solutions that are cost effective,
innovative and reliable, with consistently high levels of quality.

We are committed to the continuous improvement of all of our systems
and processes, to improve product quality and increase customer satis­faction.

ISO 9001 Registration

GE MDS adheres to this internationally accepted quality system stan­dard.

Notice

While every reasonable effort has been made to ensure the accuracy of
this manual, product improvements may result in minor differences
between the manual and the product shipped to you. If you have addi­tional questions or need an exact specification for a product, please con­tact our Customer Service Team using the information at the back of this
guide. In addition, manual updates can often be found on the GE MDS
web site at

www.GEmds.com .

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iv P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 1

1.0 ABOUT THIS MANUAL

This guide provides:

• Instructions for installing the P21 (MDS iNET/iNET-II Series)
P22 (MDS entraNET), and P23 (MDS Mercury) Protected Net­work Stations, and configuring them for desired operation

• In-service operating instructions

• Instructions for installing or changing transceivers, power sup­plies and other assemblies in the chassis

• Troubleshooting information

This manual is a system-level guide to the Protected Network Station. It
does

not contain detailed information on the radio transceivers installed

within the chassis. Radio-specific information will be found in the
appropriate manual(s) supplied with the units installed in your system.
After installation, you may wish to keep this guide, the internal radio
documentation, and all other related information near the equipment for
future reference.

2.0 PRODUCT INFORMATION

The Protected Network Station (Figure 1) is a tabletop or rack-mount
unit designed to hold two GE MDS transceivers, two power supplies,
and a switchover logic board that automatically selects between trans­ceiver A or B as the active transceiver. Manual transceiver selection
may also be made using a front panel switch.

NOTE:

When switchover occurs, a delay of approximately 30 seconds
occurs until the new radio initializes. It may take up to one
minute for the radio to re-establish a link with an associated
station.

Additionally, certain network devices may require up to 20
minutes to detect that the MAC address has changed for the IP
address of the radio. This does not affect the data-passing
ability of the radio—only the ability to conduct a console
management session.

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2 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Invisible place holder

Figure 1. Protected Network Station

With two transceivers and power supplies installed, the unit will con­tinue to communicate even if a failure occurs in one of the transceivers
or its associated power supply. This capability is important in mis­sion-critical applications where uninterrupted service is required.

At the time of publication, the following transceivers are supported by
the Protected Network Station:

• MDS iNET/iNET-II Series Access Point

• MDS iNET/iNET-II Series Dual Gateway Remote

• MDS iNET/iNET-II Series Ethernet Bridge Remote

• MDS iNET/iNET-II Series Serial Remote

• MDS entraNET (Access Point only)

• MDS Mercury (Access Point only)

The unit is equipped with alarm connections on the rear panel which
activate whenever the standby transceiver is put online. These are “dry”
(isolated) alarm contacts that may be connected to customer-supplied
external alarm equipment, such as a lamp or sounding device.

2.1 Product Features

The Protected Network Station provides:

• Fully-protected capability—Standard chassis contains two
transceivers and two power supplies. A provision for an
optional redundant antenna port is also available.

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 3

• Automatic switchover to alternate transceiver if a failure occurs
in the primary unit or its power supply.

• Optional built-in battery backup for AC-powered units

• Rear panel alarm connections for customer-supplied alarm
equipment

• Tabletop or 19-inch rack mount installation

• Utilizes standard GE MDS transceivers inside

2.2 Chassis Radio Configurations

The chassis is available in the following transceiver configurations:

•

Two transceivers installed

This configuration provides an immediately usable Protected
Network Station for new installations.

•

One transceiver installed

This configuration allows customers to add an existing trans­ceiver to the P21/22/23 chassis to create a Protected Network
Station.

•

No transceivers installed

This configuration allows customers to install two existing
transceivers in the empty chassis to create a Protected Network
Station.

NOTE:

Existing MDS iNET/iNET-II Series radios to be used in a
Protected Network Station must have firmware revision 5.1.0
or higher installed. (All firmware versions of iNET-II radios
meet this requirement.) If entraNET transceivers are used, they
must have firmware revision 2.3.7 or higher installed. Consult
the factory for firmware availability.

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4 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

2.3 Antenna Port Configurations

The Protected Network Station can be configured with a single antenna,
or with two separate antennas for full redundancy to continue operation
if the primary antenna becomes damaged or is otherwise inoperative.
The following configurations are available:

•

Single antenna port

The port is automatically switched to the active transceiver by
an internal relay.

•

Two antenna ports

Each port is connected to one of the transceivers and to separate
station antennas.

2.4 Items Supplied

Figure 2 shows the contents of a typical Protected Network Station ship­ment.

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Figure 2. Protected Network Station Typical Shipment

POWER CORD(S)
(AC type shown)

REDUNDANT
STATION

TRANSCEIVER
INSTRUCTION
MANUAL

P-21/22
INSTRUCTION
MANUAL

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 5

2.5 Model Configuration Codes

The configuration details of the Protected Network Station (as shipped
from the factory) can be quickly determined from the model number
label attached to the outside of the chassis. Figure 3 shows the signifi­cance of the model number characters printed on the label.

Invisible place holder

Figure 3. Model Configuration Codes

PACKAGE

1 - 12V DC
2 - 24 V DC
3 - 48V DC
4 - 125V DC
A - 115/230V AC w/battery
B - 115/230V AC w/o battery

ANTENNA PORTS

1 - One
2 - Redundant

P2x

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6 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

3.0 INSTALLATION

This section presents installation steps for:

1. I

nstallation Planning

2.

Installing transceiver(s) inside a chassis

This step may be skipped if transceivers are already installed.

3. Installing the Protected Network Station

Use these steps to connect external wiring and prepare the unit for
regular service.

4.

Configuring the Protected Network Station

This section describes how to set up the station for desired opera­tion, including what events will trigger a switchover to the alternate
transceiver.

5.

Optimizing radio performance

This section offers tips for obtaining peak performance from your
Protected Network Station.

3.1 Installation Planning

Helpful advice for planning a radio system, including site and antenna
selection, can be found in the manual(s) supplied with your transceivers.

The Protected Network Station is typically installed at an Access Point
(AP) site to ensure uninterrupted communication with remote radios.
For iNET/iNET-II systems, it may also be used at one or more remote
sites in a network to increase reliability and protect against equipment
failures at these locations.

Figure 4 shows a typical installation arrangement.

The installation site should have adequate and stable primary power,
suitable access for cabling, and should not be subject to temperature
extremes or poor ventilation. The unit may be placed on a sturdy
tabletop or installed in a standard 19-inch rack cabinet.

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 7

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Figure 4. Typical P-Series Installation

3.2 Installing Transceivers—MDS entraNET,
iNET/iNET-II

(If not already installed)

The modular construction of the Protected Network Station makes it
easy to install transceivers. The only tool required is a Phillips screw­driver. If the transceivers were not installed at the factory, proceed with
the steps below for installation and to connect the internal cabling. Refer
to Figure 5 during these steps.

NOTE:

Before installing a transceiver in the chassis, make sure each
radio is operating properly as a standalone unit, and is
equipped with up-to-date firmware code. The latest revision of
firmware for most GE MDS products is available for down­load at www.GEmds.com.

1. Make sure the power is off.

2. Remove the top cover of the Protected Network Station by loosen-

ing the two screws at the rear panel.

3. If a backup battery is installed in the chassis, be sure it is discon-

nected from the battery control board.

4. Remove the transceiver mounting plates from the chassis by loosen-

ing the screws that secure them to the chassis.

5. Attach the lower mounting plate to the lower transceiver (Radio B)

using four screws. Attach the mounting plate and radio to the chas­sis.

STATION ANTENNA

LOW-LOSS FEEDLINE

PC, DATA
EQUIPMENT
OR LAN

TO DATA
INTERFACE CONN.

TO ANTENNA
CONNECTOR

PRIMARY
POWER CORD(S)

P2x PROTECTED
NETWORK STATION
(With transceivers installed)

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8 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

6. Attach the upper mounting plate to the upper transceiver (Radio A)

using four screws. Place the radio/mounting plate over the top of
Radio B and attach the plate to the chassis.

7. Connect and secure the data interface, diagnostics and power cables

to the transceivers as shown in

Internal Cabling Arrangements on

Page 10

.

8. Connect the battery cable to the battery control board, if it has been

purchased and installed in the chassis. (See Figure 33 on Page 38.)

9. Re-install the top cover of the Protected Network Station and tighten

the side screws.

This completes the installation of transceivers in the chassis. Refer to

Section 3.5, External Connections to complete the installation.

Invisible place holder

Figure 5. Top View Showing Two Radios Installed

NOTE: The internal back-up battery (if equipped) is disconnected for

shipment from the factory. To enable back-up power, remove
the top cover of the chassis and connect the battery cable to the
battery control board. See Figure 33 on Page 38.

J11

COM1LAN PWR LINKCOM2

J16 J17

J13J2

J6

J8

J10J5

J14J3

J7

UPPER:
RADIO A

LOWER:
RADIO B

1

J12

J4

J18

J19

J1

J9

J15

COM2 LINKPWRLAN COM1

Battery
& Control PCB

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 9

3.3 Installing Transceivers—MDS Mercury

(If not already installed)

The modular construction of the Protected Network Station makes it
easy to install transceivers. The only tool required is a Phillips screw­driver. If the transceivers were not installed at the factory, proceed with
the steps below for installation and to connect the internal cabling. Refer
to Figure 5 during these steps.

NOTE:

Before installing a transceiver in the chassis, make sure each
radio is operating properly as a standalone unit, and is
equipped with up-to-date firmware code. The latest revision of
firmware for most GE MDS products is available for down­load at www.GEmds.com.

1. Make sure the power is off.

2. Remove the top cover of the Protected Network Station by loosen-

ing the two screws at the rear panel.

3. If a backup battery is installed in the chassis, be sure it is discon-

nected from the battery control board.

4. Remove the transceiver mounting plates from the chassis by loosen-

ing the screws that secure them to the chassis.

5. Attach the Radio A mounting plate to the first transceiver using four

screws. Secure the mounting plate and radio to the chassis.

6. Attach the Radio B mounting plate to the second transceiver using

four screws. Secure the mounting plate and radio to the chassis.

7. Connect and secure the data interface, diagnostics and power cables

to the transceivers as shown in Internal Cabling Arrangements on
Page 10.

8. Connect the battery cable to the battery control board, if this option

has been purchased and installed in the chassis. (See Figure 33 on
Page 38.)

9. Re-install the top cover of the Protected Network Station and tighten

the side screws.

This completes the installation of Mercury transceivers in the chassis.
Refer to Section 3.5, External Connections to complete the installation.

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10 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Invisible place holder

Figure 6. Top View Showing Two Mercury Radios Installed

NOTE: The internal back-up battery (if equipped) is disconnected for

shipment from the factory. To enable back-up power, remove
the top cover of the chassis and connect the battery cable to the
battery control board. See Figure 33 on Page 38.

3.4 Internal Cabling Arrangements

The following figures illustrate the internal cabling arrangements for the
P21 (MDS iNET/iNET-II version), P22 (MDS entraNET version), and
P23 (MDS Mercury version). Refer to the drawing that shows your par­ticular unit.

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 11

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Figure 7. P21 (MDS iNET/iNET-II Series) Internal Cabling—Lower

(B) Radio

J9

J9

J19

J19

J18

1

1

o

o

J15

J1

J11

J4

J12

1

1

<

<

<

<

<

<

<

<

<

<

J7

J14

J17

J3

J3

J14

J14

J5

J10

J8J6J2

J16

LOWER:

RADIO B

COM1LAN PWR LINKCOM2

Battery
& Control PCB

From Lower

Radio

To S/O-Logic

PCB Assy.

Cable Type

LAN J17 RJ-45

COM1 J2 DB-9 Male

COM2 J14 DB-9 Female

PWR J7 2-Conductor Phoenix

LINK (Antenna) J5 TNC Coaxial

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12 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Invisible place holder

Invisible place holder

Figure 8. P21 (MDS iNET/iNET-II Series) Internal Cabling—Upper

(A) Radio

COM2 LINKPWRLAN COM1

UPPER:
RADIO A

o

<

J12

J14

J14

J4

J11

J18

J3

J3

J19

J1

J9

J15

J7

J16 J17

J14J2J8

J10

J5

J6

J13J3

Battery
& Control PCB

From Upper

Radio

To S/O-Logic

PCB Assy.

Cable Type

LAN J16 RJ-45

COM1 J3 DB-9 Male

COM2 J13 DB-9 Female

PWR J6 2-Conductor Phoenix

LINK (Antenna) J10 TNC Coaxial

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 13

Invisible place holder

Invisible place holder

Figure 9. P22 (MDS entraNET) Internal Cabling—Lower (B) Radio

J9

J9

J19

J19

J18

1

1

o

o

J15

J1

J11

J4

J12

1

1

<

<

<

<

<

<

<

<

<

<

J7

J14

J17

J5

J10

J8J6J2

J16

J14J3

LOWER:

RADIO B

COM1LAN PWR LINKCOM2

Battery
& Control PCB

From Lower

Radio

To S/O-Logic

PCB Assy.

Cable Type

LAN J17 RJ-45

COM1 J14 RJ-12

COM2 J2 RJ-45

PWR J7 2-Conductor Phoenix

LINK (Antenna) J5 TNC Coaxial

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14 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Invisible place holder

Invisible place holder

Figure 10. P22 (MDS entraNET) Internal Cabling—Upper (A) Radio

COM2 LINKPWRLAN COM1

UPPER:
RADIO A

o

<

J12

J14

J14

J4

J11

J18

J3

J3

J19

J1

J9

J15

J7

J16 J17

J14J2J8

J10

J5

J6

J13J3

Battery
& Control PCB

From Upper

Radio

To S/O-Logic

PCB Assy.

Cable Type

LAN J16 RJ-45

COM1 J13 RJ-12

COM2 J3 RJ-45

PWR J6 2-Conductor Phoenix

Link (Antenna) J10 TNC Coaxial

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 15

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Figure 11. P23 (MDS Mercury) Internal Cabling—Radio A

Radio Front Panel

Connector

Switchover Logic

PCB Assy.

Cable Type

PWR J6 2-Conductor

Phoenix

LAN J16 RJ-45

COM1 J3 DB-9 Male

GPS Antenna J20 SMA Coaxial

TX/RX1 J10 TNC Coaxial

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16 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Invisible place holder

Invisible place holder

Figure 12. P23 (MDS Mercury) Internal Cabling—Radio B

Radio Front Panel

Connector

Switchover Logic

PCB Assy.

Cable Type

PWR J7 2-Conductor

Phoenix

LAN J17 RJ-45

COM1 J2 DB-9 Male

GPS Antenna J22 SMA Coaxial

TX/RX1 J5 TNC Coaxial

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 17

3.5 External Connections

All external connections are made at the unit’s rear panel. Refer to
Figure 13 for connector definitions. The text that follows provides addi­tional detail for each connector.

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Figure 13. Rear Panel of Protected Network Station

Safety Ground

Connect the rear panel ground stud to the facility’s safety ground (earth)
system.

Station Antenna Connection(s)

Connect the antenna feedline to the Type-N coaxial fitting provided on
the rear panel of the chassis. (Two such connections are required if the
unit is equipped with the Redundant Antenna Option.) If a directional
antenna is used, set its heading in the desired direction of transmis­sion/reception.

GPS Antenna Connection—P23 only

Connect the GPS antenna feedline to the SMA-type coaxial connector
on the rear panel.

NOTE: It is highly recommended that lightning protection be properly

installed for all antenna systems.

POWER
ON/OFF

POWER

INPUT

ANTENNA / LINK

PORT (A+B)

ALARM
CONNECTIONS

REDUNDANT
ANTENNA / LINK
PORT (OPTIONAL)

GROUND STUD

(AC TYPE SHOWN)

POWER SUPPLY MODULES

LAN (ETHERNET)

CONNECTOR

J1 - DCE J15 - DTE

DATA I/O
INTERFACE
(P21 iNET COM2)

(P22 entraNET COM1)
(P23 Mercury—Unused)

DATA I/O
INTERFACE
(P21 iNET COM1)

(P22 entraNET COM2)
(P23 Mercury COM1)

GPS

ANTENNA*

* P23 Only

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18 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Data Connections

For the following connections, be sure to use only the required pins for
the application. Do not use a fully-wired (25 conductor) cable on the
DB-25 ports. Refer to Figure 14 for detailed views of the DB-25 inter­face connectors and Table 1 for DB-25 I/O connector functions.

a. Connect the facility’s Ethernet cable to the rear panel

LAN con-

nector.

b. Connect the facility’s serial data equipment to the appropriate

DB-25 Data I/O connector on the rear panel.

c. If you intend to program the transceivers, or perform local diag-

nostics with a PC, connect the computer to the appropriate con­sole/terminal (DB-25) connector on the rear panel.

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Figure 14. COM1 and COM2 Pinouts

(As viewed from outside the chassis)

Table 1. DB-25 Rear Panel Data Ports & Functions

Model & Internal
Transceivers

Left (Male) DCE:
Connected to Internal
Transceiver Port

Right (Female) DTE:
Connected to Internal
Transceiver Port

P21 (MDS iNET/iNET-II
Series)

COM1/DCE/Console COM2/DTE/Data

P22 (MDS entraNET) COM2/DCE/ Data COM1/DTE/Console

P23 (MDS Mercury) COM1/DCE/Console Unused

13
12
11
10

9
8
7
6
5
4
3
2
1

Data Carrier Detect (DCD)

Data Set Ready (DSR)
Clear-to-Send Output (CTS)
Request-to-Send Input (RTS)
Received Data (RXD)
Transmitted Data (TXD)

25
24
23
22
21
20
19
18
17
16
15
14

Description

Pin
No.

Pin
No.

Description

Data Terminal Ready (DTR)

Unused
Unused
Unused
Unused
Unused

Unused
Unused
Unused
Unused
Unused
Unused

Unused

Ground

Unused

Unused

Unused

Unused

Unused

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 19

Alarm Equipment Connections

If alarm equipment (lamp, sounding device, etc.) is to be used with the
station, make the appropriate connections to the rear panel

ALARM ter-

minals.

Figure 15. Rear Panel Alarm Contacts

(For use when two radios are installed)

The ALARM terminals are “dry” (isolated) alarm contacts which close
(connect to the alarm common) when the Switchover Logic Board
detects that operation has switched to the secondary radio. Figure 15
shows the connection state in the absence of an alarm condition—the
right pin is Normally Open (NO) and the left pin is Normally Closed
(NC), with respect to the Common terminal.

The alarm contacts are rated for the following service: 0.5 Ampere at
125 Vac or 1.0 Ampere at 24 Vdc. The common terminal in the con­nector’s middle “floats” and is not connected to ground or any internal
power supply voltage source.

NOTE: The alarm functions are intended for use with a fully-popu-

lated and enabled chassis (i.e., two transceivers, two power
supplies, and both power supply switches set to ON). The front
panel switch should also be set to the AUTO position so that a
fault in the primary transceiver causes an automatic
switchover to the secondary transceiver. (It is this switchover
that applies power to the secondary radio, thereby causing the
alarm contacts to change state.)

Manual switchover to the secondary transceiver may also be
performed with the front panel switch, but it will immediately
cause the alarm contacts to change state, as a failure is assumed
in the primary radio.

Primary Power Connections

Connect input power to the power supply modules. See Figure 16
(AC units) and Figure 17 (DC units).

Alarm Common

Normally
Closed

Normally

Open

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20 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 16. Input Power Connections (AC Units)

NOTE: The internal back-up battery (if installed) is disconnected for

shipment. To enable back-up power, remove the top cover of
the chassis and connect the battery cable to the battery control
board. See Figure 5 for details.

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Figure 17. Input Power Connection (DC Units)

3.6 Mounting the Protected Network Station

The Protected Network Station can be placed on a sturdy tabletop, or
mounted in a 19 inch rack cabinet or equipment rack. Choose a
mounting location that provides easy access to the rear panel connectors
and an unobstructed view of the LED status indicators (through the rear
panel viewing slots). Figure 18 shows the dimensions of the Protected
Network Station.

POWER
ON/OFF

POWER INPUT

TRANSCEIVER B

GROUND STUD

POWER INPUT

TRANSCEIVER A

ON/OFF SWITCH

DC POWER INPUT

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21 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 18. Mounting Dimensions

3.7 Initial Startup

In-service operation of the Protected Network Station is completely
automatic. Once the unit has been properly installed and configured,
operator actions are limited to observing the LED status indicators for
proper operation.

To prepare for full operation, make sure your Protected Network Station
is properly configured for the desired service. Basic configuration
instructions are provided in this manual for:

• MDS iNET/iNET-II Series transceivers, see “Initial
MDS iNET/iNET-II Programming and Setup” on page 23.

• MDS entraNET transceivers, see “Initial MDS entraNET Pro­gramming and Setup” on page 30.

• MDS Mercury transceivers, see “Initial MDS Mercury Pro­gramming and Setup” on page 35..

If all parameters are correctly set, operation of the Protected Station can
be started as follows:

1. Apply primary power.

2. Select the active transceiver by setting the front panel

RADIO SELEC-

TION switch to A, B or AUTO. (See Table 2 for an explanation of the

switch positions.)

19.05"

484 mm

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22 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 19. Radio Select Switch

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3. If desired, you may observe the transceiver LED status panel(s) for
the proper indications by removing the unit’s top cover plate. Refer
to the transceiver’s manual for an explanation of LED functions.

4. After the basic operation of the Protected Network Station has been
checked, you may wish to optimize transceiver performance using
some of the suggestions in the transceiver’s manual.

Table 2. Radio Selection Switch Positions

Switch

Position

Function

A Transceiver A is selected as the active unit. Switchover will not

occur if a failure occurs in Transceiver A or if the Remote
Switchover is invoked.

AUTO

(Normal/Default)

The most recently selected transceiver is active. If a failure
occurs with that unit, switchover automatically occurs to the
other transceiver.

Also, when the switch is in this position, the Remote Switchover
command can be invoked.

B Transceiver B is selected as the active unit. Switchover will not

occur if a failure occurs in Transceiver B or if the Remote
Switchover command is invoked.

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23 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

4.0 PROGRAMMING THE

TRANSCEIVERS

This section presents menu settings for transceivers used in Protected
Network Stations. Only menus pertaining directly to protected network
operation are covered here. Please refer to the transceiver manual for all
other radio commands.

• For instructions on programming MDS iNET/iNET-II Series
transceivers, see “Initial MDS iNET/iNET-II Programming and
Setup” below.

• For instructions on programming MDS entraNET transceivers,
see “Initial MDS entraNET Programming and Setup” on Page

30.

• For instructions on programming MDS Mercury transceivers,
see “Initial MDS Mercury Programming and Setup” on
page 35.

4.1 Initial MDS iNET/iNET-II Programming and
Setup

This section presents menu settings for MDS iNET/iNET-II Series
transceivers used in P21 Protected Network Stations. Only menus per­taining directly to protected network operation are covered here. Please
refer to the transceiver manual for a complete list of radio commands.

NOTE: Radios used in a Protected Network Station chassis must have

firmware installed that supports redundant configuration.
MDS iNET/iNET-II Series transceivers must have revision

5.1.0 or higher installed. Consult the factory for firmware
availability.

NOTE: To ensure proper operation after a switchover, both trans-

ceivers in a Protected Network Station must have identical
configurations. After setting the configuration of one trans­ceiver, refer to “Mirrored Configuration” of Transceivers on
Page 29 to transfer the same profile to the other radio.

Redundancy Configuration Menus

You enter the Redundancy Configuration menus by selecting this option
from the transceiver’s Main Menu (Figure 20). If the redundancy func­tion is not already enabled, a password prompt appears. If you do not
have a password, contact your factory representative for assistance.

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24 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 20. Transceiver’s Main Menu

Upon successful entry to the redundancy menus, the screen shown in
Figure 21 appears. This is the starting point for setting all parameters
related to redundancy switchover. The first menu item,

Redundancy Con-

figuration

, must be set to Enabled, for the switchover function to be active.

NOTE: When switchover occurs, a delay of approximately 30 seconds

occurs until the new radio initializes. It may take up to one
minute for the radio to re-establish a link with an associated
station.

Additionally, certain network devices may require up to 20
minutes to detect that the MAC address has changed for the IP
address of the radio. This does not affect the data-passing
ability of the radio—only the ability to conduct a console
management session.

Select this item for

redundancy configuration menus

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25 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 21. Redundancy Menu (Top Level)

Select the letter of the item you wish to configure, and a sub-menu
appears with settable parameters. (Exception: Selecting the last item,

Force Switchover does not bring up a sub-menu. It initiates an immediate

change to the other transceiver.)

The following screens show the Redundancy sub-menus and provide
brief descriptions of their functionality.

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Figure 22. Network Event Trigger Configuration

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26 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Figure 22 shows a list of Network Events that can trigger a switchover.
When

ENABLED is selected in the menu, the event will trigger a

switchover. When

DISABLED is selected, no switchover occurs for that

event. An explanation of menu items is provided below:

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Figure 23. Radio Event Trigger Configuration

Figure 23 above shows the list of Radio Events that can trigger a
switchover. When the status is

ENABLED, the event will trigger a

switchover. When the status is

DISABLED, no switchover occurs for that

event. An explanation of menu items is provided below:

AP Ethernet Link
Disconnected

The AP’s Ethernet cable is disconnected, damaged, or
the AP hasn’t been able to poll a specified address.

For this event to occur, the following values must be
configured properly on the Redundancy Configuration
Options menu:

Ethernet Link H/W Watch enable/disable

Ethernet Link Poll Address X.X.X.X

Network Interface Error There is a problem with the network interface.

MAC Decryption Failed Caused by mismatched encryption phrases. When this

occurs, the units will associate, but data will not be
passing in both directions.

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27 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

Country/SkipZone Mismatch The unit is not receiving the correct frequency

hopping format.

Lack of Associated Remotes
Exceeded Threshold

The Access Point fails to have any associated
remotes for specified period of time.

For this event to occur properly, the following
value must be configured in the Redundancy
Configuration Options menu:

Lack of Remotes for x (seconds)

For Remotes (instead of above):

Loss of Associated AP
Exceeded Threshold

The Remote fails to have an associated AP for
specified period of time.

For proper detection, the following value must
be configured in the Redundancy
Configuration Options menu:

Loss of Access Point for x (seconds)

Packet Receive Errors
Exceeded Threshold

The rate of Packet Receive Errors exceeded
the defined threshold

For proper detection, the following values must
be configured in the Redundancy
Configuration Options menu. (These configure
the Maximum number or packet receive errors
within a specific period of time before a
redundancy switchover occurs.):

Maximum Receive Errors x

Receive Error Count Interval x (seconds)

Packet Retry Errors Exceeded
Threshold

The rate of Packet Send Errors exceeded the
defined threshold

For proper detection, the following values must
be configured in the Redundancy
Configuration Options menu. (These configure
the Maximum number or packet retry errors
within a specific period of time before a
redundancy switchover occurs.):

Maximum Retry Errors x

Retry Error Count Interval x (seconds)

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28 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 24. Hardware Event Trigger Configuration

Figure 24 above shows the list of Hardware Events that will trigger a
switchover. When

ENABLED is selected, the event triggers a switchover.

When set to

DISABLED, no switchover occurs for that event. An explana-

tion of menu items is provided below:

MAC communication Failed The main CPU is unable to communicate to the

MAC.

FPGA communication Failed The main CPU is unable to communicate to the

FPGA.

ADC output Railed The Analog to Digital Converter is railed.

Frequency Not Calibrated The unit’s Frequency Adjustment Algorithm is

not properly calibrated

Power Not Calibrated The unit’s Power Adjustment Algorithm is not

properly calibrated

Flash Test Failed There is a problem with the Flash memory

PLL Not locked The Phase Lock Loop was not locked

RF Power Control Saturated
High

There is a hardware defect that is causing the
Power Control Loop to fail.

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29 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 25. Redundancy Configuration Options

The Redundancy Configuration Options screen (Figure 25) allows you
to set the threshold limits or behavior for many redundancy-triggering
events. To configure an option, simply select the letter of the menu item
and follow the instructions at the bottom of the screen.

“Mirrored Configuration” of Transceivers

To ensure proper operation after a switchover, it is important that both
transceivers in a Protected Network Station have the identical configu­ration profile. This can be accomplished using a configuration file as
follows:

1. Install transceivers in the chassis as described earlier. Apply power

to the Protected Network Station.

2. Set the front panel

RADIO SELECTION switch to “A”.

RF Power Control Saturated Low There is a hardware defect that is causing the

Power Control Loop to fail.

Initialization Error The software failed to initialize properly.

Additional Menu Item for Remotes:

SNR Below Threshold

The Signal to Noise ratio is below the
user-defined threshold.

For proper detection, the following value must
be configured in the Redundancy
Configuration Options menu on the Remote:

SNR Threshold x

Additional Menu Item for Remotes:

RSSI Below Threshold

The Receiver Signal Strength Indication is
below the user-defined threshold.

For proper detection, the following value must
be configured in the Redundancy
Configuration Options menu on the Remote:

RSSI Threshold x (dBm)

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30 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

3. Configure Radio A (upper unit) as appropriate. Save the configura-

tion file to a TFTP server as described in the transceiver manual.

4. Set the front panel

RADIO SELECTION switch to “B”. Download the

saved configuration file into Radio B (lower unit).

5. This completes the configuration procedure. Set the front panel

switch to

AUTO, re-install the top cover, and the unit is ready for ser-

vice.

4.2 Initial MDS entraNET Programming and Setup

This section presents menu settings for MDS entraNET transceivers
used in P22 Protected Network Stations. Only menus pertaining directly
to protected network operation are covered here. Please refer to the
transceiver manual (Part No. 05-4055A01) for a complete list of radio
commands and other operation details.

(For instructions on programming MDS iNET/iNET-II Series trans­ceivers, see “Initial MDS iNET/iNET-II Programming and Setup” on
Page 23.)

NOTE: MDS entraNET radios used in a Protected Network Station

must have firmware revision 2.3.7 or higher installed. Consult
the factory for firmware availability.

Redundancy Menu

Redundancy is available only at the AP. The Redundancy Menu is used
in protected installations where a backup transceiver can be immedi­ately placed online should a primary unit fail. This protects against
“single point of failure” scenarios. The Redundancy menu contains
selections and settings that are used to manage redundancy functions.

NOTE: The chassis uses a Switchover Logic Board (Part No.

03-6061Axx). This board is similar in appearance to the one
used in P20 configurations, but they are not interchangeable.
Consult factory for assistance with replacement PCBs.

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31 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 26. Redundancy Menu

• Redundancy Configuration—This selection is used to enable or
disable redundancy operation. When the supervisory board
detects an alarm condition, the currently selected transceiver is
disabled, and the backup transceiver comes online.
[

enabled, disabled; disabled]

•

Network Event Triggers—This selection presents a submenu (see

Figure 27) with Ethernet (network) related alarm conditions.

•

Hardware Event Triggers—This selection presents a submenu (see

Figure 28) with parameters related to local alarm conditions.

•

Redundancy Configuration Options—This selection presents a sub-

menu (see Figure 29) for duration settings related to network
events. (e.g., if a PING attempt fails after xx minutes, a contin­gency action will be taken, such as the radio switching from the
active to standby unit.)

•

Force Switchover—This selection invokes an immediate switcho-

ver from the active to the standby unit.

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32 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 27. Network Event Triggers Menu

• Network Interface Error—This selection is used to enable or dis­able redundancy switchover on the occurrence of a Network
Interface Error. [

enabled, disabled; enabled]

Invisible place holder

Figure 28. Hardware Event Triggers Menu

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 33

• Frequency Not Calibrated—This selection is used to enable or dis­able redundancy switchover if a frequency calibration error
occurs. If this error occurs, the radio will require factory service.
[

enabled, disabled; disabled]

•

Power Not Calibrated—This selection is used to enable or disable

redundancy switchover if an RF power calibration error occurs.
If an error occurs, the radio will require factory service.
[

enabled, disabled; disabled]

Invisible place holder

Figure 29. Redundancy Configuration Options Menu

• Lack of Associated Remotes Exceeded Threshold—This selection
brings up another screen (Figure 30) where you can specify the
duration of time that a redundant AP waits before considering
itself to be malfunctioning. (A system must have at least one
associated remote to be functional.)

•

Packet Receive Errors Exceeded Threshold—This selection brings

up another screen (Figure 31) where you can specify the number
of packet errors that must be exceeded in a given time frame
before a redundant AP considers itself to be malfunctioning.

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34 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 30. Lack of Associated Remotes Exceeded Threshold Menu

• Lack of Remotes for—the duration of time that a redundant AP
waits (in seconds) before considering itself to be malfunction­ing.

Invisible place holder

Figure 31. Packet Rx Errors Exceeded Threshold Menu

This screen contains two settings relating to Packet Receive Errors. One
setting sets the number of missed packets, and the other sets a time
interval after which an error is declared. The settings work together, and
both criteria must be met before a redundancy switchover occurs.

These configuration settings are intended for data-intensive applications
and must be customized for your specific application.

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 35

• Maximum Receive Errors—Here, you specify the number of packet
errors that must be exceeded before a redundant AP is reported
as malfunctioning. This setting works in conjunction with the
Interval setting below. [

0-1000; 300]

•

Receive Error Count Interval—This field is used for entering a time

interval that dictates the duration (in seconds) that works in con­junction with the Maximum Receive Errors above.
[

time interval; 300 seconds]

4.3 “Mirrored Configuration” of Transceivers

To ensure proper operation after a switchover, it is important that both
MDS entraNET transceivers in a P22 Protected Network Station have
the identical operational configuration profiles. This can be accom­plished using a configuration file of one transceiver to configure the
second transceiver mounted in the protected chassis. The follows steps
outline the configuration process. Please review the use of a terminal
and TFTP programs in the radio transceiver’s manual before starting the
procedure.

1. Install transceivers in the chassis as described earlier. Apply power
to the Protected Network Station.

2. Set the front panel

RADIO SELECTION switch to “A”.

3. Configure Radio A (upper unit) as appropriate. Save the configura­tion file to a TFTP server as described in the transceiver manual.

4. Set the front panel

RADIO SELECTION switch to “B”. Download the

saved configuration file into Radio B (lower unit).

5. This completes the configuration procedure. Set the front panel
switch to

AUTO, re-install the top cover, and the unit is ready for ser-

vice.

4.4 Initial MDS Mercury Programming and Setup

Redundancy Configuration (AP Only)

Only AP Mercury radios may be used in a P23 chassis, and a second,
properly configured radio must be present.

Mercury’s Redundancy Configuration Menu (Figure 32) is where you
enable/disable redundancy operation and define the triggers that will
cause a switchover to the alternate unit.

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36 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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Figure 32. Redundancy Configuration Menu (AP Only)

Below are brief descriptions of the menu items available on the Redun­dancy Configuration Menu. Refer to the Mercury Reference Manual
(Part No. 05-4446A01) for complete details on this menu and its associ­ated submenus.

•

Redundancy Configuration—Enable/disable redundancy switcho-

ver for an AP. [

enabled, disabled; disabled]

• Network Event Triggers—This selection brings up a submenu
where you can set/view the trigger status for Network Events.

•

Radio Event Triggers—This selection presents a submenu where

you can set/view the trigger status for Radio Events, such as a
loss of associated Remotes or excessive packet errors.

•

Hardware Event Triggers—This selection brings up a submenu

where you can set/view the trigger status for initialization/hard­ware errors.

•

Redundancy Configuration Options—Presents a submenu where

you can set the threshold criteria for declaring an error event.

•

Force Switchover—Selecting this option forces a manual (user

initiated) switchover to the backup AP. The “challenge ques­tion”

Are you sure? (y/n) is presented to avoid an unintended

switchover. To invoke the change, press the letter

y followed by

the Enter key.

5.0 TROUBLESHOOTING

The radio LED status indicators are an important troubleshooting tool
and should be checked whenever a problem is suspected. Consult the
transceiver manual for a discussion of LED functions.

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 37

When an alarm condition exists, the transceiver creates an alarm code or
message that can be read on a PC terminal connected to the rear panel

DIAGNOSTICS port. This information can be helpful in resolving many

system difficulties. Consult the transceiver manual for a discussion of
alarm messages and corrective action.

6.0 TECHNICAL REFERENCE

6.1 Field-Replaceable Assemblies and Parts

Table 3 lists field-replaceable internal assemblies and parts available to
implement repairs. Contact the factory for price and availability.

Replacing Power Supply Modules

Power supply modules are held in place with two knurled thumbscrews
at the rear of the chassis. To remove a power supply, loosen the two cap­tive screws and slide the unit straight out. (There are no cables to discon­nect, as the modules are fitted with in-line connectors.)

To re-install the modules, make sure that the slides are properly aligned
with the guide slots on the chassis, and push straight in. Tighten the
thumbscrews to secure the assembly.

Replacing Other Assemblies

The Switchover Logic Board and the front panel Indicator Board
(03-3307A01) are held in place with Phillips screws. To remove these
assemblies, disconnect all connectors from the board and remove the
mounting screws. The boards can then be removed from the chassis.

Table 3. Field Replaceable Assemblies and Parts

Assembly Part Number

Power Supply Module 03-1143A12 (115/230 Vac)

03-2613A02 (18-36 Vdc)

03-2613A03 (36-75 Vdc)

03-2613A04 (10.5-16 Vdc)

Switchover Logic Board
(P21/P22)

03-6061A01

Switchover Logic Board
(P23)

03-6061A03

Battery Control Board 03-3362A01

Indicator Board 03-3307A01

Backup Battery (1.2 Ah) 28-1575A03

Top Cover Plate 82-3365A01

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38 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

The Backup Battery (28-1575A03) and Battery Control Board
(03-3362A01), if present, can be removed by loosening the bracket that
holds it to the chassis and disconnecting its push-on terminals. Use care
not to short the battery terminals during removal. Figure 33 shows the
battery, control board and associated interface cables.

Invisible place holder

Figure 33. Backup Battery and Control Board Assemblies

6.2 Specifications

Physical

Case: Aluminum (rack mountable 2U)

Dimensions: 8.9 cm (3.5”) high

48.3 cm (19.0”) wide

35.6 cm (14.0”) deep

Weight: 5.74 kg (12.65 lbs.) w/o transceivers

Approx. 1 kg (2.2 lbs.) additional for each trans­ceiver

Environmental

Temperature Range: 0°C to +50°C (32° to 122° F)

Humidity: 95% at 40°C (104° F), non-condensing

Power Supplies

115/230 Vac with battery backup
12 Vdc (10.5-15 Vdc Operating Range)
24 Vdc (18-36 Vdc Operating Range)
48 Vdc (36-72 Vdc Operating Range)

Connect to J12 on the

Connect to J1 on
Battery Control PCB

Battery (L) & Battery Control Board (R)

Switchover Logic PCB

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station 39

General

Frequency Range: Dependent on transceiver(s) installed. See trans-

ceiver manual.

Data Interface: IP/Ethernet, Serial (RS-232). Provided by two rear

panel DB-25 connectors (DCE and DTE)

Diagnostic Interface: Serial (RS-232), Telnet, or Web browser. Provided

by a rear panel DB-25 connector.

Alarm Output: Dry (isolated) contacts for controlling an alarm

device upon primary power failure or transceiver
switchover.

Transceiver Ordering Options

Transceiver Complement: 1, 2 or no transceivers mounted in chassis

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40 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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05-4161A01, Rev. C P21/P22/P23 Protected Network Station I-1

A

Antenna

port configurations 4

B

Battery Control Board, replacing 37

C

Configurations

antenna port 4
chassis 3

D

Dimensions, mounting 21

F

Features 2

I

Illustrations

model configuration codes 5
Protected Network Chassis chassis 2
Protected Network Station chassis, internal view 8, 10
Protected Network Station installation 7
Protected Network Station mounting dimensions 21
Protected Network Station rear panel 17
Protected Network Station shipment contents 4

radio selection switch 22
Indicator Board, replacing 37
Installation 6–21

initial start-up 21

mounting chassis 20

planning 6

programming transceivers 23, 30

transceivers 7, 9

M

Model configuration codes, illustrated 5

P

Power supply

replacing module 37
Procedures

initial start-up 21

installing transceivers 7, 9

mounting Protected Network Station chassis 20

programming transceivers 23, 30

replacing parts (Technical Reference) 37

troubleshooting 36
Protected Network Station

typical installation 7
Protected Network Station chassis

configurations 3

features 2

how to mount 20

illustrated 2

internal view, illustrated 8, 10

rear panel, illustrated 17

replacement parts for 37

shipment contents, illustrated 4

R

Radio selection switch, illustrated 22
Rear panel

connections, illustrated 17

Replacement parts 37

replacing 37

S

Start-up procedures 21
Switchover Logic Board, replacing 37

T

Tables

radio selection switch positions 22
Technical reference (assembly replacement) 37
Transceivers

initial programming 23, 30

installation of 7, 9
Troubleshooting 36

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I-2 P21/P22/P23 Protected Network Station 05-4161A01, Rev. C

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IN CASE OF DIFFICULTY...

GE MDS products are designed for long life and trouble-free operation. However, this equipment, as with
all electronic equipment, may have an occasional component failure. The following information will assist
you in the event that servicing becomes necessary.

TECHNICAL ASSISTANCE

Technical assistance for GE MDS products is available from our Technical Support Department during
business hours (8:00 A.M.—5:30 P.M. Eastern Time). When calling, please give the complete model
number of the radio, along with a description of the trouble/symptom(s) that you are experiencing. In many
cases, problems can be resolved over the telephone, without the need for returning the unit to the factory.
Please use one of the following means for product assistance:

Phone: [phone] E-Mail: [e-mail]

FAX: [phone] Web: www.GEmds.com

FACTORY SERVICE

Component level repair of this equipment is not recommended in the field. Many components are installed
using surface mount technology, which requires specialized training and equipment for proper servicing.
For this reason, the equipment should be returned to the factory for any PC board repairs. The factory is
best equipped to diagnose, repair and align your radio to its proper operating specifications.

If return of the equipment is necessary, you must obtain a Service Request Order (SRO) number. This
number helps expedite the repair so that the equipment can be repaired and returned to you as quickly as
possible. Please be sure to include the SRO number on the outside of the shipping box, and on any corre­spondence relating to the repair. No equipment will be accepted for repair without an SRO number.

SRO numbers are issued online at www.GEmds.com/support/product/sro/. Your number will be issued
immediately after the required information is entered. Please be sure to have the model number(s), serial
number(s), detailed reason for return, ship to address, bill to address, and contact name, phone number,
and fax number available when requesting an SRO number. A purchase order number or pre-payment will
be required for any units that are out of warranty, or for product conversion.

If you prefer, you may contact our Product Services department to obtain an SRO number:

Phone Number: 585-241-5540
Fax Number: 585-242-8400
E-mail Address: [e-mail]

The radio must be properly packed for return to the factory. The original shipping container and packaging
materials should be used whenever possible. All factory returns should be addressed to:

GE MDS, LLC
Product Services Department
(SRO No. XXXX)
175 Science Parkway
Rochester, NY 14620 USA

When repairs have been completed, the equipment will be returned to you by the same shipping method
used to send it to the factory. Please specify if you wish to make different shipping arrangements. To
inquire about an in-process repair, you may contact our Product Services Group using the telephone, Fax,
or E-mail information given above.

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GE MDS, LLC

Rochester, NY 14620

General Business: [phone]

FAX: [phone]

Web: www.GEmds.com

175 Science Parkway

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