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Datacom DM991C User Manual

Datacom DM991C
89 pages
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DM991 SERIES V
DM991C
DM991CE
DM991S
DM991SE
PRODUCT MANUAL
204.4092.08 rev. 08 Date: 8/12/2008

Table of Contents

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Datacom DM991C Specifications

General IconGeneral
BrandDatacom
ModelDM991C
CategoryModem
LanguageEnglish

Summary

Warranty Information

General Recommendations

Safety and Installation Precautions

Observe security instructions, grounding, and static electricity precautions during installation and operation.

Introduction to DM991 Series V Modems

G.SHDSL Interface

G.SHDSL Interface Characteristics

Describes G.SHDSL transmission, line coding, and modulation for different annexes.

G.SHDSL Handshake Process

Explains the pre-activation phase for establishing G.SHDSL connections.

G.SHDSL Training Phase

Details the activation phase for determining digital filter coefficients.

G.SHDSL Data Mode Operation

Describes the final stage of G.SHDSL connection for normal data transmission.

G.SHDSL Interface Configuration Options

Covers software configuration for terminal type, frame mode, and annex.

G.SHDSL Performance and Reach

Discusses performance factors and reach based on data rate and line conditions.

G.SHDSL Four-Wire Operation

Explains operating modes for 4-wire G.SHDSL modems on two or four wires.

V.35-V36/V.11 Digital Interface

G.703 - G.704 Interface Standards

G.704 Frame Structure

Describes the G.704 frame structure, timeslots, and multiframe organization.

CRC4 Multiframe Structure Table

Table detailing the CRC4 multiframe structure and bit assignments.

CAS Multiframe Structure

Describes CAS multiframe alignment using timeslot 16 for channel signaling.

G.703 Electrical Characteristics

Details HDB3 coding and AMI coding for G.703 signals.

G.703 Coaxial Cable Electrical Specs

Specifies electrical characteristics for G.703 coaxial cable interfaces.

G.703 Twisted Pair Electrical Specs

Specifies electrical characteristics for G.703 twisted pair interfaces.

Straps and DIP Switches Map

Technical Specifications

Annex I: Safety Warnings

General Safety Precautions

Provides essential safety warnings for installation, operation, and maintenance.

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