Microwave networks CM7, CM8 User Manual

CM7/8

100Base-T

Digital Microwave Radio

System User’s Manual

Site____________________ Part Number 8821607-00 Rev. E Issued: 5/05

CM7/8 100Base-T Manual Revision History

Section Changed Pages Changed

Revision A – Initial Release

Revision B - 8/03

Front Matter cover, history, contents Chapter 1, General Information 1-2, 1-8, 1-10, 1-11, 1-12 Chapter 2, Principles of Operation 2-2, 2-4, 2-15, 2-16 Chapter 3, Module Descriptions 3-4-1 to 3-4-4, 3-7-3, 3-7-4, 3-8-1, 3-9-1 to 3-9-4 Chapter 6, Maintenance 6-4, 6-28, 6-31 Appendix B, QuikLink Screens B-27, B-30 Appendix D, Alarm Codes All Appendix E, Frequency Settings E-1 Appendix F , SNMP Option F-3 to F-5, F-7 to F-9, F-12, F-18

Rev. C 11/21/03

Front Matter cover, revision history, TOC Chapter 3, Module Descriptions 3-7-4, 3-7-5, 3-12-4, 3-12-5 Appendix C, Configuration Tab les C-1 to C-8 Index I-1 to I-4

Rev. D 2/25/04

Front Matter all Chapter 3, Module Descriptions 3-1, 3-2, 3-1-1 to 3-1-12 (all), 3-14-1 to 3-14-6 (all) Chapter 4, Installation all Appendix C, Configuration Tab les all Index all

Rev. E 5/04/05

Front Matter cover,

revision history, LOF (xxv)

Chapter 2, Principles of Operation 2-2, 2-15, 2-16, 2-17 Appendix D, Alarm Codes D-5

CM7/8 100Base-T System User’s Manual 5/04/05 Page iii

Page iv 5/04/05 CM7/8 100Base-T System User’s Manual

Using This Manual

Introduction

Welcome to the CM7/8 100Base-T System User’s Manual. Use this section as a short guide of the organization of information in this manual. Use the Table of Contents for further detail.

Manual Organization

Apart from this, manual chapters and sections include the following:

Glossary—describes common terms and acronyms used in this manual. Table of Contents—indexes subject headings and page numbers.

Chapter 1,

equipment description and system specifications. Chapter 2,

radio, equipment descriptions and configurations, switching and loopback information, and detailed instructions on how to use the radio features.

Chapter 3, other module-specific information, such as operation, features, and jumper and switch settings.

Chapter 4, configure, and install the radio.

Chapter 5, Chapter 6,

module replacement procedures.

Appendix A, Appendix B, QuikLink Appendix C, Appendix D, Appendix E,

General Information—information about the radio system including

Principles of Operation—including a description of signal flow through the

Module Descriptions—divided into sections with module block diagrams and

Equipment Installation—gives step-by-step instructions on how to unpack,

System Verification—describes radio alignment and tests. Maintenance—procedures, and provides sections on troubleshooting and

T/I Curves—for the CM7/8 100Base-T radio.

Screens—description used on the local maintenance terminal. Configuration Tables—necessary to prepare the radio for operation. Alarm Codes—alarm condition codes that the system logs.

Frequency Settings—LO FREQ ADJ dip switch settings.

CM7/8 100Base-T System User’s Manual Page v

Appendix F,

Index—index of key words.

SNMP Option—discusses the SNMP option installation and operation.

Chapter 2 Alignment

Quick Reference

The following quick reference table identifies tasks and the manual sections with the appropriate information or procedure.

Quick Reference Table

Description Chapter

How to install the radio 4 How to verify radio operation 5 How to maintain the radio 6 How to troubleshoot the radio 6 How to repair the radio 6 How to spare the radio TXU/RXU 6 How to switch TX 2 How to switch RX 2 How to initiate loopbacks 2 How to enable or disable APC 2 How to check or change frequency 2 How to change protection configuration 2 How to add service channel 2 How to add orderwire 2 How to add a WTU 2 How to check for alarms 2 How to check the alarm log 2 How to check performance values 2 How to establish RF loopback 6 How to check receive threshold 5 How to check Tx fade margin 5 How to add NMU 2 How to add SNMP management App. F

Page vi CM7/8 100Base-T System User’s Manual

Commercial Warranty

Microwave Networks, Inc. (MNI) manufactured products are warranted to be free from defect in material and workmanship for a period of two (2) years from date of shipment. In the event of a defect during the warranty period, Buyer will return item to the MNI depot repair facility for repair or replacement. Repair at MNI's option may include the replacement of parts or equipment, and all replaced parts or equipment shall be the property of MNI. Parts or equipment replaced during the warranty period are warranted for the remainder of the original applicable warranty period or ninety (90) days, whichever is greater. This express warranty is extended by MNI to the original Buyer for commercial, industrial or governmental use. Such action on the part of MNI shall be the full extent of MNI's liability and Buyer's exclusive remedy.

This warranty extends only to products manufactured by MNI, and it is expressly conditioned upon the equipment having been installed in accordance with the installation practices accepted by the telecommunications industry, the standard installation and configuration practices recommended by MNI, and the equipment having been maintained in accordance with MNI recommended standard maintenance practices. Frequency sensitive components, towers, vidicon tubes, test equipment, batteries, and other manufacturers' products are excluded, but carry their own separate limited warranties as authorized by the individual manufacturers.

This warranty shall automatically terminate if the product is used in other than its normal and customary manner, has been subject to misuse, accident, neglect or damage, has improper alterations or repairs made to it, or if nonconforming parts are used in the product, unless done by a service facility authorized by MNI to perform warranty service. An authorization to return products to MNI under this warranty must be obtained from the MNI Customer Care Center prior to making shipment to MNI's repair center . All returns shall be shipped freight prepaid and collect shipments will not be accepted. MNI will prepay return freight charges on repaired and replaced products found to be defective. There will be a minimum charge for each warranty module replacement requested as an emergency exchange.

Because each radio system is unique, MNI disclaims liability for range, coverage, or operation of a system as a whole under this warranty except by a separate written agreement signed by an officer of MNI. MNI's total liability is limited to the total price of the products sold. Buyer's sole remedy is to request MNI, at MNI's option, to either refund the purchase price, repair or replace product(s) that are not as warranted. No action shall be brought for any breach of this contract more than one (1) year after the accrual of such cause of action except for money due upon open account.

This MNI warranty is given in lieu of all other warranties, either expressed or implied, which are specifically excluded, including warranties of merchantability or fitness for a particular purpose. In no event shall MNI be liable for any incidental or consequential damages arising from this warranty.

Where you can find us

Company Headquarters:

Microwave Networks 4000 Greenbriar Stafford, TX 77477 USA Tel 281.263.6500 Fax 281.263.6400 Toll free in US 1.888.225.6429

Internet: www.microwavenetworks.com

24-Hour Customer Service Hotline

Tel 281.263.6501 Toll free in US 1.888.225.4762

International

London Tel 44.1628.788383 Fax 44.1628.788424

Glossary

ACO — Alarm Cut Off. ACU — Alarm and Control Unit. A/D or ADC — Analog-to-Digital Converter. AGC — Automatic Gain Control. AIS — Alarm Indication Signal (all “1” bit pattern). ALBO — Automatic Line Build Out. ALC — Automatic Level Control. ALM — Alarm. AMI — Alternate Mark Inversion. Annunciator — Sub-board on Access Panel that contains the alarm cut-off (ACO) switch and LED, Major LED, Minor LED,

Manual LED and SEC Fail LED. ANT — Antenna. APC — Automatic Power Control. ATDE — Adaptive Time Domain Equalizer (plug-in module). This unit combats linear channel distortions caused by all

sources, but is specifically used to fight dispersive fade degradations. ATT — Attenuation. AUX — Auxiliary.

B8ZS — Binary Eight Zero Substitution. BB — Baseband. The lowest frequency around which signals are process e d. BCH — Bose-Chaudhuri-Hocquenghem — A block format FEC code, characterized by high efficiency and applicability to

random error event channels. BER — Bit Error Rate. BGT — Backward Guard Time. BPF — Band Pass Filter. BPV — Bipolar Violation. BW — Bandwidth.

CCIR — International Radio Consultative Committee.

CM System Users Manual Page ix

Glossary

CCITT — International Telegraph and Telephone Consultative Committee. C/I — Carrier-to-Interference Ratio. CLK — Clock. Codec — Coder/Decoder. Co-located — located in the same rack, as in two CM radios. Constellation — The totality of possible signal states used by the modem to send level information. Each point comprising

the pattern is described by I and Q coordinates. CTIA — Cellular Telecommunications Industry Association.

D — D word time or pattern; D frame. D/A or DAC — Digital-to-Analog Converter. DADE — Differential Absolute Delay Equalization. dBm0 — dB above reference noise measured with C-message weighting at 0 transmission level point. DEC — Double Error Correction. DEMOD — Demodulator (plug-in module). DFM — Dispersive Fade Margin, a measure (in dB) of a system's immunity to dispersive fade activity. DISGAP — Distributed GAP. Dispersive Fade — A change in propagation condition which affects the shape of the desired channel response. Typically, this

is caused by multipath activity and is equalized by the ATDE and Slope Equalizer. DIU — Drop and Insert Unit (plug-in module). DIV — Diversity. DRO — Dielectric Resonator Oscillator. DS1 — Digital Signal 1, the primary multiplex level in North American TDM hierarchy (1.544 Mbps). DS3 — Digital Signal 3, the third multiplex level in North American TDM hierarchy (44.736 Mbps). DSB — Double Side Band. DSB-SC — Double Side Band-Suppressed Carrier. DTMF — Dual Tone Multi-frequency. DVM — Digital Voltmeter.

E1— Primary multiplex level in International TDM hierarchy (2.048 Mbps). E3— Third multiplex level in International TDM hierarchy (34.368 Mbps). EFS — Error Free Seconds. EMC — Electromagnetic Compatibility.

Page x CM System Users Manual

EMI — Electromagnetic Interference. ENC — Encoder. ES — Error Second. ESD — Electrostatic Discharge.

FE — Framing Error. FEC — Forward Error Correction. FEC Gap — Frame gap that coincides with FEC parity bit times. FER — Frame Error Rate. FET — Field Effect Transistor. FF — Frequency Diversity Transmitter/ Frequency Diversity Receiver. FGT — Forward Guard Time. FI — FEC “I” Flag.

Microwave Networks

FIFO — First In First Out. Flat Fade — A change in propagation conditions which affects the level of the received signal. This is compensated for by

receiver AGC and possibly transmitter APC. FLC — Frame Loss Counter. FLS — Frame Loss Second. Form A — Relay with normally open contacts. Form B — Relay with normally closed contacts. Form C — Relay with transfer contacts. FQ — FEC “Q” Flag. FR — Frame Resupply. FREQ — Frequency. FS — Symbol rate.

Gray Code — A counting scheme using binary numbers whereby adjacent numbers differ in only one bit position.

HDBn — High Density Bipolar signal, with a maximum of “n” consecutive zeros. HH — Hot Standby Transmitter/Hot Standby Receiver. HHU — Hand-held Unit.

CM System Users Manual Page xi

Glossary

HP — Hop Parity. HS — Hot Standby Transmitter/Space Diversity Receiver. H/W —Hardware.

IF — Intermediate Frequency (70 MHz). IFP — Interface Panel. In-Service — System carries live traffic. INT — Interference. I/P or IN — Input. ISI — Inter-symbol Interference.

J K L

LBO — Line Build Out. LDU — Local Display Unit. LED — Light Emitting Diode. LEV —Level. LNA — Low Noise Amplifier. LNDC — Low Noise Down Converter. LO — Local Oscillator. LOS — Line of Site. LOW — Local Orderwire. LPF — Low Pass Filter.

M — M word time or pattern; M frame. Mbps — Megabits per second. MDI — Media Dependent Interface MGC — Manual Gain Control. MHSB — Monitored Hot Standby radio protection configuration. MLA — Microwave Link Analyzer.

Page xii CM System Users Manual

Microwave Networks

MOD — Modulator (plug-in module). Modem — Modulator/Demodulator. MTBF — Mean Time Between Failure. MTTR — Mean Time to Repair. Multipath — Dynamic linear distortion characterized by notches and/or slope in the channel frequency response. The

phenomena is caused by multiple independent propagation paths connecting transmitter and receiver. MUX — Multiplexer (plug-in module). MWG — Microwave Generator.

NC — Normally Closed relay contact. NCS — Network Communications Software. NF — Noise Figure. NM — Network Management. NMS — Network Management System. NN — Non-protected Transmitter/ Non-protected Receiver. NO — Normally Open relay contact. NRZ — Non-Return to Zero. NS — Non-protected Transmitter/Space Diversity Receiver.

OC-3 — SONET optical line rate of 155.52 Mbps OFS — Operational Fixed Services (Part 94). O/P — Output. Out-of-Service — System not carrying live traffic. OWU — Orderwire Unit (plug-in module).

PA — Power Amplifier. PAM — Pulse Amplitude Modulation. PCA — Printed Circuit Assembly. PCB — Printed Circuit Board. PER —Parity Error Rate. PES — Parity Error Second. PF — Propagation Flag.

CM System Users Manual Page xiii

Glossary

PLD — Programmable Logic Device. PLL — Phase Lock Loop. PLO — Phase Lock Oscillator. PRBS — Pseudorandom Bit Sequence. P/S — Parallel-to-Serial (Data Stream Conversion). PSF — Previous Section Fail. PSU (RF) — RF Power Supply Unit (plug-in module). PSU (SP) — SP Power Supply Unit (plug-in module). PWR — Power.

QAM — Quadrature Amplitude Modulation. QPSK — Quadrature Phase Shift Keying Modulation.

REA — Rural Electrification Administration. RF — Radio Frequency. RFI — Radio Frequency Interference. RFS — Radio Frequency Shelf. RMU — Rack Mounting Units, 1.75 inches. RU — Rack Unit, 1.75 inches. RX — Receive(r). RXU — Receiver Unit (plug-in module).

SBY — Standby. SC — Service Channel. SCU — Service Channel Unit (plug-in module). SD — Space Diversity radio protection configuration. SEC — Seconds. SF — Signal Failed (140 Mb/s). SLEQ — Slope Equalizer. SO — Stuff Opportunity. SP — Signal Processing. S/P — Serial-to-Parallel (Data Stream Conversion).

Page xiv CM System Users Manual

Microwave Networks

SPS — Signal Processing Shelf. SR — Stuff Request. SS — Space Diversity Transmitter/Space Diversity Receiver. S/W — Software. SWR — Switching Request. SYM — Symbol. Symbol Rate or Frequency (fs) —The rate (frequency) at which symbols are generated. Since symbols represent any of 3, 5,

or 7 bits (for 8, 32, and 128 QAM respectively), the system bit rate is 3, 5, or 7 times higher than the symbol rate.

SYNDES — Synchronizer/Desynchronizer (plug-in module).

T1 — Transmission medium capable of carrying a TDM signal at 1.544 Mbps. T3 — Digital Signal 3, the third multiplex level in North American TDM hierarchy (44.736 Mbps). TDM — Time Division Multiplexing. T/I — Threshold to Interference. TIU — TELESCAN Interface Unit. T/R — Transmitter/Receiver pair (2 T/Rs in a monitored hot standby radio). TTL — Transistor-Transistor Logic. TX — Transmit(ter). TXU — Transmitter Unit (plug-in module).

U/C — Upconverter. UI — Unit Interval, Jitter. UIS — User Interface Software. UPSTRM — Upstream. VCO — Voltage Controlled Oscillator. VF — Voice Frequency.

XO — Crystal Oscillator. XTL — Crystal. XPD — Cross-Polarization Discrimination.

CM System Users Manual Page xv

Glossary

X Y Z

Page xvi CM System Users Manual

Table of Contents

Chapter 1–General Information

Introduction............................................................................................................................................... 1-1

Radio Features........................................................................................................................................... 1-2

IP Protocol and DS3/E3 Data Transfer ..................................................................................................... 1-3

Radio Network Configuration................................................................................................................... 1-4

Channel Capacity ...................................................................................................................................... 1-6

Equipment Description.............................................................................................................................. 1-6

Transmission Engineering......................................................................................................................... 1-8

Channel Separation................................................. .... ........................................................................ 1-8

System Gain..................................... .... .... ...................................................................... ..................... 1-8

Interference......................................................................................................................................... 1-8

Specifications............................................................................................................................................ 1-9

Transmitter Power........................................... ... ................................................................................ 1-9

Receiver Sensitivity............................................................................................................................ 1-9

Chapter 2–Principles of Operation

General Information.................................................................................................................................. 2-1

Transmit Function .............................................................................................................................. 2-1

Receive Function................................................................................................................................ 2-2

RF Modules............................................................................................................................................... 2-3

Branching Waveguide........................................................................................................................ 2-3

Transmitter Unit ................................................................................................................................. 2-4

RF Power Supply................................................................................................................................ 2-4

Signal Processing ...................................................................................................................................... 2-5

Access Panel....................................................................................................................................... 2-5

SP Modules......................................................................................................................................... 2-5

ATDE and DFM................................................................................................................................. 2-6

RF Equipment Configurations .................................................................................................................. 2-7

Protection............................................................................................................................................ 2-7

Protection Switching......................................................... .... .................................................................. 2-10

Automatic and Manual..................................................................................................................... 2-10

A Typical SYNDES Module Failure......................................................................................... 2-10

Hot-Standby Switching .................................................................................................................... 2-10

Transmit Switching .......................................................................................................................... 2-11

Transmit SYNDES-MUX Switch ............................................................................................. 2-11

Transmit TXU-MOD Switch..................................................................................................... 2-11

Transmit SCU Switch................................................................................................................ 2-11

Transmit WTU Switch............................................................................................................... 2-12

Switching Transmit Paths Manually........................................ .... .............................................. 2-12

Receive Switching............................................................................................................................ 2-12

Receiver RXU-DEMOD Switch ............................................................................................... 2-12

Receiver SYNDES-MUX Switch Level.................................................................................... 2-12

Receiver SCU Switch................................................................................................................ 2-13

Receive WTU Switch................................................................................................................ 2-13

Diversity Switching........................................................................ .................................................. 2-13

CM7/8 100Base-T System User’s Manual Page xvii

Microwave Networks

Loopbacks................................................................................................................................................ 2-14

Setting Loopback.............................................................................................................................. 2-15

Performing RF Local Loopback.................................................. .... .... ...................................... 2-15

Performing IF Local Loopback.................................................................................................. 2-16

Performing SYNDES Loopback................................................................. .... ........................... 2-16

Performing SCU Loopback ................................................................................ .... ................... 2-16

Performing WTU Loopback...................................................................................................... 2-16

Adaptive Power Control.......................................................................................................................... 2-17

Chapter 3–Module Descriptions

Introduction ............................................................................................................................................... 3-1

Section 3-1–Radio Cabinet

Introduction ............................................................................................................................................ 3-1-1

Access Panel........................................................................................................................................... 3-1-1

Principles of Operation.................................................................................................................... 3-1-4

Access Panel Features ..................................................................................................................... 3-1-5

8209302-00 – Universal 28DS1 to 100BaseT Access Panel.................................................... 3-1-5

8209245-00 Access Panel.........................................................................................................3-1-8

SP Shelf Backplane .............................................................................................................................. 3-1-11

Jumpers.......................................................................................................................................... 3-1-11

RF Shelf Backplane............................................................... .... ........................................................... 3-1-12

Equipment Rack ................................................................ .... ............................................................... 3-1-12

Auxiliary Equipment ..................................................................................................................... 3-1-12

Installation Accessory Kit .................................................................................................................... 3-1-12

Section 3-2–RF Distribution

General Information ............................................................................................................................... 3-2-1

Functional Description ........................................................................................................................... 3-2-2

Physical Description.......................................................... ..................................................................... 3-2-4

HH Features..................................................................................................................................... 3-2-4

HS Features...................................................................................................................................... 3-2-5

NS Features...................................................................................................................................... 3-2-5

FF Features...................................................................................................................................... 3-2-6

NN Features..................................................................................................................................... 3-2-6

Section 3-3

Transmitter Unit (TXU)

Functional Description ........................................................................................................................... 3-3-2

TX Features............................................................................................................................................ 3-3-3

Setting TXU Boards............................................................................................................................... 3-3-4

Alarm/Control Board....................................................................................................................... 3-3-4

TX IF BPF/LO................................................................................................................................. 3-3-4

Section 3-4–Receiver Unit (RXU)

Introduction ............................................................................................................................................ 3-4-1

General Information ............................................................................................................................... 3-4-1

Introduction ............................................................................................................................................ 3-3-1

CM7/8 100Base-T System User’s Manual Page xviii

Microwave Networks

General Information ............................................................................................................................... 3-3-1

Functional Description ........................................................................................................................... 3-4-2

Front Panel Features.................................................................................. .... .... ..................................... 3-4-3

Setting RX Boards.................................................................................................................................. 3-4-4

MLN7905 RX Control..................................................................................................................... 3-4-4

Section 3-5–RF Power Supply Unit (RF PSU)

Introduction ............................................................................................................................................ 3-5-1

General Information ............................................................................................................................... 3-5-1

Functional Description ........................................................................................................................... 3-5-2

RF PSU Board Features................................................. .... ..................................................................... 3-5-3

Section 3-6–SP Power Supply Unit (SP PSU)

Introduction ............................................................................................................................................ 3-6-1

General Information ............................................................................................................................... 3-6-1

Functional Description ........................................................................................................................... 3-6-2

SP Power Supply Features...................................................................................................................... 3-6-3

Section 3-7–Alarm and Control Unit (ACU)

Introduction ............................................................................................................................................ 3-7-1

General Information ............................................................................................................................... 3-7-1

Functional Description ........................................................................................................................... 3-7-2

ACU Features......................................................................................................................................... 3-7-3

Setting the ACU Board........................................................................................................................... 3-7-3

Section 3-8–Modulator (MOD)

Introduction ............................................................................................................................................ 3-8-1

General Information ............................................................................................................................... 3-8-1

Functional Description ........................................................................................................................... 3-8-2

MOD Features........................................................................................................................................ 3-8-3

Setting the MOD Board.......................................................................................................................... 3-8-4

Section 3-9–Demodulator (DEMOD)

Introduction ............................................................................................................................................ 3-9-1

General Information ............................................................................................................................... 3-9-1

Functional Description ........................................................................................................................... 3-9-2

DEMOD Features................................................................................................................................... 3-9-3

Setting the DEMOD Board .................................................................................................................... 3-9-4

Section 3-10–Multiplexer (MUX)

Introduction .......................................................................................................................................... 3-10-1

General Information ............................................................................................................................. 3-10-1

Functional Description ......................................................................................................................... 3-10-2

MUX Features...................................................................................................................................... 3-10-3

Setting the MUX Board........................................................................................................................ 3-10-4

Section 3-11–Synchronizer/Desynchronizer (SYNDES)

Introduction .......................................................................................................................................... 3-11-1

General Information ............................................................................................................................. 3-11-1

CM7/8 100Base-T System User’s Manual Page xix

Microwave Networks

Functional Description ......................................................................................................................... 3-11-2

Transmit......................................................................................................................................... 3-11-2

Receive .......................................................................................................................................... 3-11-2

SYNDES Features................................................................................................................................ 3-11-4

Setting the SYNDES Board.................................................................................................................. 3-11-5

Section 3-12–Service Channel Unit (SCU)

Introduction .......................................................................................................................................... 3-12-1

General Information ............................................................................................................................. 3-12-1

Functional Description....................................................................................................................................3-12-2

SCU Features........................................................................................................................................ 3-12-3

Setting the SCU Board ......................................................................................................................... 3-12-4

Section 3-13–Orderwire Unit (OWU)

Introduction .......................................................................................................................................... 3-13-1

General Information ............................................................................................................................. 3-13-1

Functional Description ......................................................................................................................... 3-13-2

OWU Features...................................................................................................................................... 3-13-4

Orderwire Handset...................................................................... ................................................... 3-13-4

Setting the OWU Board ....................................................................................................................... 3-13-5

Configuring the Orderwire, Service Channel, and Bridge................................................................... 3-13-7

Section 3-14–Wayside Traffic Unit (WTU)

Introduction .......................................................................................................................................... 3-14-1

General Information ............................................................................................................................. 3-14-1

Functional Description ......................................................................................................................... 3-14-2

WTU User Features.............................................................................................................................. 3-14-3

MLN7330 Settings ........................................................................................................................ 3-14-4

8000608-00 Settings...................................................................................................................... 3-14-5

MLN7329 Settings ........................................................................................................................ 3-14-6

Section 3-15–Network Management Unit (NMU)

Introduction .......................................................................................................................................... 3-15-1

General Information ............................................................................................................................. 3-15-1

Functional Description ......................................................................................................................... 3-15-1

Configuring the P4 NMU..................................................................................................................... 3-15-4

Jumper Settings................................................... .... .... ................................................................... 3-15-4

DIP Switches ................................................................................................................................. 3-15-5

Chapter 4–Equipment Installation

Introduction ............................................................................................................................................... 4-1

Preparing the Installation........................................................................................................................... 4-1

Preparing the Site................................................................................................................................ 4-1

Unpacking Equipment........................................................................................................................ 4-4

Installing the Equipment Rack .................................................................................................................. 4-4

Grounding the Rack................................................ ............................................................................ 4-6

DC Power Cables................................................................................................................................ 4-7

Verifying DC Cabling ........................................................................................................................ 4-7

Cabling the Access Panel .............................................................. ............................................................ 4-8

CM7/8 100Base-T System User’s Manual Page xx

Microwave Networks

Signal Wiring...................................................................................................................................... 4-9

Connecting Monitoring Devices.............................................................................................................. 4-15

Connecting the LMT ........................................................................................................................ 4-15

Configuring the LMT ....................................................................................................................... 4-15

Connecting Local Access ................................................................................................................. 4-16

Verifying Operation................................................................................................................... 4-18

Connecting Modems ......................................................................................................................... 4-18

DTE/DCE Wiring...................................................................................................................... 4-19

Connecting Antennas............................................................................................................................... 4-21

Chapter 5–System Verification

Introduction ............................................................................................................................................... 5-1

Inspecting the System............................................. ... ................................................................................ 5-1

Radio Configuration....................................................... .... ................................................................ 5-1

IF Cabling........................................................................................................................................... 5-7

RF Cabling.......................................................................... ................................................................ 5-7

Verifying Operation................................................................................................................................... 5-8

DC Voltages ................................................ .... ... .... ............................................................................ 5-8

System Configuration......................................................................................................................... 5-8

SP Operation....................................................................................................................................... 5-8

Modulator Frequency ......................................................................................................................... 5-9

LO Frequency..................................................................................................................................... 5-9

TX Carrier/RX LO.............................................................................................................................. 5-9

Output Power.................................................................. .... ................................................................ 5-9

LEDs................................................................................................................................................. 5-10

Data Link ......................................................................................................................................... 5-10

Ethernet Link.................................................................................................................................... 5-10

Throughput ....................................................................................................................................... 5-10

Latency ............................................................................................................................................. 5-10

Service Channel ............................................................................................................................... 5-10

Receive Threshold............................................................................................................................ 5-11

Tx Fade Margin................................................................................................................................ 5-12

Record RSL/AGC............................................................................................................................. 5-13

Commissioning the Radio ....................................................................................................................... 5-15

Recommended Test Equipment............................................................................................................... 5-16

Test Tables............................................................................................................................................... 5-18

Chapter 6–Maintenance

Introduction ............................................................................................................................................... 6-1

Calling for Service..................................................................................................................................... 6-1

Repair/Exchange Service.................................................................... .... .... ... ..................................... 6-1

Technical Support............................................ ... .... ............................................................................ 6-3

Recommended Test Equipment................................................................................................................. 6-3

Local Maintenance ............................................................................................................................. 6-4

Maintenance Procedures............................................................................................................................ 6-4

Transmitter Tests................................................................................................................................ 6-4

DC Voltage Tests................................................................................................................................ 6-5

Troubleshooting Procedures...................................................................................................................... 6-6

Checking LEDs................................................................................................................................... 6-6

Checking the ACU.............................................................................................................................. 6-7

CM7/8 100Base-T System User’s Manual Page xxi

Microwave Networks

Checking LMT Alarms....................................................................................................................... 6-7

Checking Alarm Logs......................................................................................................................... 6-8

Viewing Statistics............................................................................................................................... 6-8

Field Changes............................................................................................................................................ 6-9

Changing LO Frequency .................................................................................................................... 6-9

Check LO Frequency................................................................... .... ............................................ 6-9

Change LO Frequency................................................................................................................. 6-9

Changing Configuration..................................................................................................................... 6-9

Adding a SCU/WTU/OWU........................................................ .... .................................................. 6-10

Adding a NMU............................................ ...................................................................... ............... 6-10

Replacing RF Modules..................................................................................................................... 6-11

Replacing the TXU.................................................................................................................... 6-11

Replacing the RXU.................................................................................................................... 6-12

Replacing SP Modules...................................................................................................................... 6-12

Troubleshooting Charts........................................................................................................................... 6-13

Site Engineering Appendix A–T/I Curves

Introduction .............................................................................................................................................. A-1

T/I Ratio.................................................................................................................................................... A-1

Appendix B–QuikLink Screens

Introduction .............................................................................................................................................. B-1

Verifying the ACU Software Version...................................................................................................... B-1

Software Revision.............................................................................................................................. B-1

Screen Layout................................................................ .... ....................................................................... B-2

Selecting Screens............................................................................................................................... B-2

Aborting Changes.............................................................................................................................. B-2

Navigating Screens............................................................................................................................ B-2

Monitoring Radio Functions..................................................................................................................... B-4

Index of Screens....................................................................................................................................... B-4

Screen Menu Flowcharts...................................................................................................... .................... B-7

Local Maintenance Screens...................................................................................................................... B-9

Appendix C–Configuration Tables

Introduction .............................................................................................................................................. C-1

Appendix D–Alarm Codes

Introduction .............................................................................................................................................. D-1

Appendix E–Setting Frequency Switches

Introduction ............................................................................................................................................... E-1

CM7 Switch Settings................................................................................................................................. E-1

CM8 Switch Settings................................................................................................................................. E-5

CM7/8 100Base-T System User’s Manual Page xxii

Microwave Networks

Appendix F–CM SNMP

Introduction ............................................................................................................................................... F-1

What is CM SNMP?.................................................................................................................................. F-1

SNMP Option Components....................................................................................................................... F-2

The SNMP Front Panel....................................................................................................................... F-2

The SNMP NMU (Network Management Unit)................................................................................ F-3

Layout of a CM SNMP Network............................................................................................................... F-4

Installing Hardware....................................................... .... ........................................................................ F-5

Connecting Cables.............................................................................................................................. F-6

Ethernet (10BaseT) Port.............................................................................................................. F-6

SCE Port ...................................................................................... ................................................ F-6

Local Access Port ........................................................................................................................ F-7

Installing Software..................................................... .... .... ........................................................................ F-8

Install .................................................................................................................................................. F-8

Configure............................................................................................................................................ F-8

System Operation .................................................................................................................................... F-10

SNMP Network Manager................................................................................................................. F-10

Microwave Networks MIB........................................................................................................ F-10

MIB Tables................................................................................................................................ F-10

Performance Table..................................................................................................................... F-11

Configuration Table................................................................................................................... F-12

Fault Manager Table.................................................................................................................. F-12

CM SNMP Traps....................................................................................................................... F-13

Diagnostics ................................................................................................................................ F-13

Telnet................................................................................................................................................ F-14

Telnet Commands.................................................................... .... .... .......................................... F-15

Telnet Command Usage .................................................. .... .... ..................................................F-16

Index

CM7/8 100Base-T System User’s Manual Page xxiii

Microwave Networks

CM7/8 100Base-T System User’s Manual Page xxiv

List of Figures

Chapter 1–General Information

Figure 1-1. CM7/8 100Base-T Digital Microwave Radio.................................................. 1-1

Figure 1-2. CM 100Base-T Hot Standby System Block Diagram..................................... 1-3

Figure 1-3. Typical Single-Hop Configuration................................................................... 1-5

Figure 1-4. Multi-Hop Configuration................................................................................. 1-5

Figure 1-5. CM7/8 100Base-T Radio in Hot-Standby Configuration................................ 1-7

Chapter 2–Principles of Operation

Figure 2-1. RF Shelf; Hot-Standby TX/RX and Hot-Standby TX/Space Diversity RX.... 2-3

Figure 2-2. Signal Processing Shelf in Protected Configuration........................................ 2-6

Figure 2-3. Hot Standby TX, Hot Standby RX (HH) Signal Flow .................................... 2-7

Figure 2-4. Hot Standby TX, Space Diversity RX (HS) Signal Flow................................ 2-8

Figure 2-5. Non-Protected TX, Space Diversity RX (NS)................................................. 2-9

Figure 2-6. Non-Protected TX/RX (NN) Signal Flow....................................................... 2-9

Figure 2-7. Monitored Hot Standby Switching Diagram .................................................. 2-11

Figure 2-8. Radio Loopback Levels................................................................................. 2-14

Figure 2-9. RF and IF Loopback Setup............................................................................ 2-16

Chapter 3–Module Descriptions Section 3-1–Radio Cabinet

Figure 3-1-1. 8209309-00 – 28DS1, 3DS3, 155-Mbps, and 100BaseT Access Panel ....... 3-1-2

Figure 3-1-2. 8209245-00 – 12DS1, 3DS3, 155-Mbps, and 100BaseT Access Panel ....... 3-1-3

Figure 3-1-3. Power Distribution Diagram......................................................................... 3-1-4

Figure 3-1-4. Features of the Universal 28DS1 to 100BaseT Access Panel (8209302-00) 3-1-5

Figure 3-1-5. 8209245-00 Access Panel Features .............................................................. 3-1-8

Figure 3-1-6. SNMP Network Interface ............................................................................. 3-1-9

Figure 3-1-7. SP Backplane Jumpers (from the front of the chassis)............................... 3-1-11

Figure 3-1-8. RF Shelf Backplane ( from the front of the rack)....................................... 3-1-12

Section 3-2–RF Distribution

Figure 3-2-1. HH (TX & RX Hot Standby) RF Distribution.............................................. 3-2-2

Figure 3-2-2. HS (TX Hot Standby, RX Space Diversity) RF Distribution ....................... 3-2-2

Figure 3-2-3. NS (TX Non-Protected, RX Space Diversity) RF Distribution.................... 3-2-3

Figure 3-2-4. FF (TX & RX Frequency Diversity) RF Distribution.................................. 3-2-3

Figure 3-2-5. NN (TX/RX Non-protected) RF Distribution............................................... 3-2-4

Figure 3-2-6. Hot-Standby (HH) Waveguide FiltersFilters (HH)....................................... 3-2-4

Figure 3-2-7. HS (Hot-Standby TX/Space Diversity Rx) Waveguide Filters..................... 3-2-5

Figure 3-2-8. NS (Non-Protected TX/Space Diversity Rx) RF Distribution ..................... 3-2-5

Figure 3-2-9. FF (TX/RX Frequency Diversity) RF Distribution ...................................... 3-2-6

Figure 3-2-10. NN (Non-Protected) RF Distribution ........................................................... 3-2-6

Section 3-3–Transmitter Unit (TXU)

Figure 3-3-1. Transmitter Unit............................................................................................ 3-3-1

Figure 3-3-2. TXU Block Diagram..................................................................................... 3-3-2

Figure 3-3-3. Transmitter Features..................................................................................... 3-3-3

Figure 3-3-4. TXU Alarm/Control Board........................................................................... 3-3-4

CM7/8 100Base-T System User’s Manual Page xxv

Figure 3-3-5. TX IF BPF/LO Board Jumper Locations...................................................... 3-3-4

Section 3-4–Receiver Unit (RXU)

Figure 3-4-1. Receiver Unit (RXU).................................................................................... 3-4-1

Figure 3-4-2. Receiver Functions........................................................................................ 3-4-2

Figure 3-4-3. RXU Features................................................................................................ 3-4-3

Figure 3-4-4. Jumper Locations for MLN7905 ................................................................ .. 3-4-4

Section 3-5–RF Power Supply Unit (RF PSU)

Figure 3-5-1. RF Power Supply Unit.................................................................................. 3-5-1

Figure 3-5-2. RF PSU Block Diagram................................................................................ 3-5-2

Figure 3-5-3. RF Power Supply Board ............................................................................... 3-5-3

Section 3-6–SP Power Supply Unit (SP PSU)

Figure 3-6-1. SP Power Supply Unit .................................................................................. 3-6-1

Figure 3-6-2. SP PSU Block Diagram................................................................................ 3-6-2

Figure 3-6-3. SP PSU Features........................................................................................... 3-6-3

Section 3-7–Alarm and Control Unit (ACU)

Figure 3-7-1. Alarm and Control Unit................................................................................ 3-7-1

Figure 3-7-2. ACU Block Diagram..................................................................................... 3-7-2

Figure 3-7-3. ACU Features................................................................................................ 3-7-3

Microwave Networks

Section 3-8–Modulator (MOD)

Figure 3-8-1. Modulator..................................................................................................... 3-8-1

Figure 3-8-2. MOD Block Diagram.................................................................................... 3-8-2

Figure 3-8-3. MOD Features............................................................................................... 3-8-3

Figure 3-8-4. MOD Board Jumper Locations..................................................................... 3-8-4

Section 3-9–Demodulator (DEMOD)

Figure 3-9-1. Typical Demodulator .................................................................................... 3-9-1

Figure 3-9-2. DEMOD Block Diagram .............................................................................. 3-9-2

Figure 3-9-3. DEMOD Features ......................................................................................... 3-9-3

Figure 3-9-4. DEMOD Board Jumper Locations................................................................ 3-9-4

Section 3-10–Multiplexer (MUX)

Figure 3-10-1. Typical Multiplexer..................................................................................... 3-10-1

Figure 3-10-2. MUX Operations Block Diagram............................................................... 3-10-2

Figure 3-10-3. MUX Features............................................................................................. 3-10-3

Figure 3-10-4. MUX Jumper Locations.............................................................................. 3-10-4

Section 3-11–Synchronizer/Desynchronizer (SYNDES)

Figure 3-11-1. Typical SYNDES Module......................................................... ................. 3-11-1

Figure 3-11-2. SYNDES Block Diagram ........................................................................... 3-11-3

Figure 3-11-3. SYNDES Feature........................................................................................ 3-11-4

Figure 3-11-4. Switch Locations for SYNDES Module..................................................... 3-11-5

Section 3-12–Service Channel Unit (SCU)

Figure 3-12-1. Service Channel Unit.................................................................................. 3-12-1

Figure 3-12-2. SCU Block Diagram................................. .................................................. 3-12-2

Figure 3-12-3. SCU Features................................................................................ .............. 3-12-3

CM7/8 100Base-T System User’s Manual Page xxvi

Figure 3-12-4. SCU Jumper Locations and Dip Switch Settings ....................................... 3-12-4

Section 3-13–Orderwire Unit (OWU)

Figure 3-13-1. Orderwire Unit............................................................................................ 3-13-1

Figure 3-13-2. Orderwire Unit Block Diagram .................................................................. 3-13-3

Figure 3-13-3. OWU Features ............................................................................................ 3-13-4

Figure 3-13-4. Handset Features......................................................................................... 3-13-4

Figure 3-13-5. OWU Jumper and Switch Locations........................................................... 3-13-5

Figure 3-13-6. Orderwire with SCU-Dual Narrow Band VF ............................................. 3-13-7

Figure 3-13-7. Orderwire with SCU-Single WideBand VF................................................ 3-13-7

Section 3-14–Wayside Traffic Unit (WTU)

Figure 3-14-1. Wayside Traffic Unit................................................................................... 3-14-1

Figure 3-14-2. Signal Flow Through the Wayside Traffic Unit.......................................... 3-14-2

Figure 3-14-3. WTU User Features .................................................................................... 3-14-3

Figure 3-14-4. MLN7330 WTU Jumper and Switch Locations......................................... 3-14-4

Figure 3-14-5. 8000608-00 WTU....................................................................................... 3-14-5

Figure 3-14-6. MLN7329 WTU Jumper and Switch Locations......................................... 3-14-6

Section 3-15–Network Management Unit (NMU)

Figure 3-15-1. Network Management Unit Block Diagram............................................... 3-15-3

Figure 3-15-2. Jumpers on the Network Management Unit (NMU) .................................. 3-15-4

Figure 3-15-3. DIP Switch S1 Values................................................................................. 3-15-5

Microwave Networks

Chapter 4–Equipment Installation

Figure 4-1. Typical 19-Inch Telco Rack............................................................................. 4-2

Figure 4-2. Floor Mounting.................. .............................................................................. 4-3

Figure 4-3. Overhead Rack Support................................................................................... 4-3

Figure 4-4. DC Power Connections.................................................................................... 4-5

Figure 4-5. Power Connection for Dual Battery Source..................................................... 4-5

Figure 4-6. Power Connection for a Single Battery Source ............................................... 4-6

Figure 4-7. Rack Ground Wiring.................................................................. ...................... 4-6

Figure 4-8. Improper Ground Connection.......................................................................... 4-7

Figure 4-9. Connections on the Access Panels................................................................... 4-8

Figure 4-10. Network Bridge Connections; Radios and Telescan...................................... 4-14

Figure 4-11. Terminal to Radio Connection; DTE-to-DTE................................................ 4-17

Figure 4-12. T erminal to Radio Connection; DTE-to-DCE and Null-Modem................... 4-17

Figure 4-13. Modem Connection to Local Access Port ..................................................... 4-18

Figure 4-14. DTE-to-DTE and DTE-to-DCE Wiring......................................................... 4-20

Figure 4-15. Antenna Port Connections for NN or HH Radios.......................................... 4-21

Figure 4-16. Antenna Port Connections for Space Diversity Radio................................... 4-22

Chapter 5–System Verification

Figure 5-1. SP HH Configuration....................................................................................... 5-3

Figure 5-2. RF HH Configuration ...................................................................................... 5-3

Figure 5-3. SP HS Configuration........................................................................................ 5-4

Figure 5-4. RF HS Configuration....................................................................................... 5-4

Figure 5-5. SP NS Configuration........................................................................................ 5-5

Figure 5-6. RF NS Configuration....................................................................................... 5-5

Figure 5-7. SP NN Configuration....................................................................................... 5-6

Figure 5-8. RF NN Configuration ...................................................................................... 5-6

Figure 5-9. IF and RF Cabling............................................................................................ 5-7

CM7/8 100Base-T System User’s Manual Page xxvii

Chapter 6–Maintenance

Figure 6-1. TXU Bandpass Filter Location...................................................................... 6-11

Figure 6-2. Synthesizer Switch Location.......................................................................... 6-12

Site Engineering Appendix A–T/I Curves

Figure A-1. CM7 CW Interference Curve, SP TXU, APC Off.......................................... A-2

Figure A-2. CM7 CW Interference Curve, SP TXU, APC On .......................................... A-2

Figure A-3. CM8 CW Interference Curve, DHP TXU, APC Off...................................... A-3

Figure A-4. CM8 CW Interference Curve, DHP TXU, APC On....................................... A-3

Appendix B–QuikLink Screens

Figure B-1. Screen 002 – Main Menu................................................................................. B-2

Figure B-2. Flowchart - Main Menus.................................................................................. B-7

Figure B-3. Flowchart - Performance Monitoring Screens................................................. B-7

Figure B-4. Flowchart -A larm and Status Screens.............................................................. B-8

Figure B-5. Flowchart - Configuration Screens............................ ...................................... B-8

Figure B-6. Flowchart - Control and Maintenance Screens................................................ B-9

Appendix C–Configuration Tables

Microwave Networks

Appendix D–Alarm Codes Appendix E–Setting Frequency Switches

Figure E-1. Frequency Switch Arrangement ............................. ......................................... E-2

Figure E-2. CM8 Synthesizer Switch Arrangement ........................................................... E-6

Appendix F–CM SNMP

Figure F-1. SNMP NMU Front Panel................................................................................. F-2

Figure F-2. SNMP NMU Card............................................................................................ F-3

Figure F-3. Typical CM SNMP Network ............................ ............................................... F-5

Figure F-4. Network Interface Ports ................................................................................... F-6

Figure F-5. Example of setup-ppp Entries.................................................. ........................ F-9

Figure F-6. Example of Radio Network Connections ........................................................ F-9

Figure F-7. CM SNMP MIB Tables ................................................................................. F-11

Figure F-8. CM SNMP Telnet Shell................................................................................. F-14

Figure F-9. Main Telnet Display....................................................................................... F-15

Index

CM7/8 100Base-T System User’s Manual Page xxviii

List of Tables

Chapter 1–General Information

Table 1-A. MDI and MDI-X Port Pin Connections.....................................................................1-4

Table 1-B. CM7/8 100Base-T Radio Sections and Modules....................................................... 1-7

Table 1-C. CM7/8 100Base-T Radio Specifications .................................................................1-10

Table 1-D. General Specifications.............................................................................................1-11

Chapter 2–Principles of Operation

Table 2-A. RF Shelf Module Requirements (numbers denote module quantities)......................2-4

Table 2-B. SP Shelf Module Requirements.................................................................................2-5

Chapter 3–Module Descriptions

Table 3-A. CM7/8 100Base-T Modules.......................................................................................3-1

Section 3-1–Radio Cabinet

Table 3-1-A. 8209302-00 Configuration Switch Settings............................................................3 -1-7

Table 3-1-B. 8209245-00 Data Channel Configuration...............................................................3-1-8

Table 3-1-C. 8209245-00 DS3 Configuration..............................................................................3 -1-8

Table 3-1-D. Jumpers – Network Bridge Interface......................................................................3-1-8

Table 3-1-E. Radio Fuses........................................... ................................................... ...............3-1-9

Table 3-1-F. SP Backplane Jumper Settings ............................................................................3-1-11

Table 3-1-G. MLN7730 Accessory Kit Contents.......................................................................3-1-12

Section 3-2–RF Distribution

Table 3-2-A. Waveguide Branching Network Options................................................................3-2-1

Table 3-2-B. Transmit and Receive Bandpass Filter Options......................................................3-2-1

Section 3-3–Transmitter Unit (TXU)

Table 3-3-A. TXU Part Numbers.................................................................................................3-3-1

Table 3-3-B. Tx/Rx Spacing Options...........................................................................................3-3-2

Table 3-3-C. TXU IF BPF/LO Board Jumper Settings................................................................3-3-5

Section 3-4–Receiver Unit (RXU)

Table 3-4-A. RXU Part Numbers.................................................................................................3-4-2

Table 3-4-B. RXU Control Board MLN7905A Jumper Settings.................................................3-4-4

Section 3-5–RF Power Supply Unit (RF PSU) Section 3-6–SP Power Supply Unit (SP PSU) Section 3-7–Alarm and Control Unit (ACU)

Table 3-7-A. ACU Jumper Settings ...................................... ... ....................................................3-7-4

Table 3-7-B. ACU DIP Switch Settings.......................................................................................3-7-5

CM7/8 100Base-T System User’s Manual Page xxxi

Section 3-8–Modulator (MOD)

Table 3-8-A. MOD Jumper Settings.............................................................................................3-8-4

Section 3-9–Demodulator (DEMOD)

Table 3-9-A. DEMOD Board Default Settings............................................................................3-9-4

Section 3-10–Multiplexer (MUX)

Table 3-10-A. MUX Jumper Settings...........................................................................................3-10-4

Section 3-11–Synchronizer/Desynchronizer (SYNDES)

Table 3-11-A. S2—10/100Base-T Interface Mode Setting..........................................................3-11-5

Section 3-12–Service Channel Unit (SCU)

Table 3-12-A. SCU Jumper Settings............................................................................................3-12-4

Table 3-12-B. SCU S1 and S2 DIP-Switch Settings for Digital Channels..................................3-12-5

Section 3-13–Orderwire Unit (OWU)

Microwave Networks

Table 3-13-A. OWU Jumper Settings ..........................................................................................3-13-5

Table 3-13-B. OWU Switch Settings ...........................................................................................3-13-6

Section 3-14–Wayside Traffic Unit (WTU)

Table 3-14-A. MLN7330 WTU Line Coding Jumper Settings*..................................................3-14-4

Table 3-14-B. MLN7330 WTU Line Buildout Switch Settings ..................................................3-14-4

Table 3-14-C. 8000608-00 WTU Equalizer Control / Line Length Settings...............................3-14-5

Table 3-14-D. 8000608-00 Line Code Select Settings.................................................................3-14-5

Table 3-14-E. MLN7329 WTU Jumper Settings.........................................................................3-14-6

Table 3-14-F. MLN7329 WTU Switch Settings..........................................................................3-14-6

Section 3-15–Network Management Unit (NMU)

Table 3-15-A. NMU Jumper Settings...........................................................................................3-15-4

Table 3-15-B. NMU Switch S1 Settings ......................................................................................3-15-5

Table 3-15-C. NMU Switch S2 Settings ......................................................................................3-15-5

Chapter 4–Equipment Installation

Table 4-A. CM Radio Accessory Kit (MLN7730) ......................................................................4-4

Table 4-B. Recommended Minimum Wire Gauge Size ..............................................................4-7

Table 4-C. DS1 Connector Pinning .............................................................................................4-9

Table 4-D. 10/100Base-T Port.....................................................................................................4-9

Table 4-E. DS3 and 155-Mbit Connections...............................................................................4-10

Table 4-F. DB15 TTL Interface Connections............................................................................4-11

Table 4-G. DB25 Alarm/Control Relay Connections ................................................................4-11

Table 4-H. Modular (RJ11) Interface Connections....................................................................4-12

Table 4-I. Network Port Connections.......................................................................................4-13

Table 4-J. Local Access Port ....................................................................................................4-16

Table 4-K. Modem Communication Requirements...................................................................4-19

Table 4-L. DTE-to-DCE Cable Connections.............................................................................4-19

Table 4-M. DTE-to-DTE Cable Connections.............................................................................4-19

CM7/8 100Base-T System User’s Manual Page xxxii

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