3Com 3C13886 Installation Guide - Page 166

Router 1-port T1 Voice Fic

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3Com Router Module Guide DB-15 Router RJ-45 Chapter 4 RJ-45 Voice Device 120- ohm balanced twisted pair cable Network interface120-ohm E1 connector trunk cable Figure 4-55 Extend an E1 120-ohm balanced twisted-pair cable z If the impedance of the to-be-connected port is 75-ohm, Use a 75-to-120-ohm adapter for connection. Step 3: Power on the router, and check the behavior of the LINK LED on the ROUTER 1-PORT E1 VOICE FIC panel: OFF means fault occurs on the line. Check it for the cause. 4.17 ROUTER 1-PORT T1 VOICE FIC 4.17.1 Introduction ROUTER 1-PORT T1 VOICE FIC, the 1-port T1 voice interface card, is intended for handling dense signals in a VoIP system. It delivers the VoIP function on T1 lines. The ROUTER 1-PORT T1 VOICE FIC comprises one motherboard and one daughter card, providing a CT1/PRI interface for handling 24 channels of voice signals. 4.17.2 Interface Attributes The following table describes the ROUTER 1-PORT T1 VOICE FIC interface attributes. Table 4-37 Interface attributes of the ROUTER 1-PORT T1 VOICE FIC Attribute Description Connector DB-15 Number of connectors 1 Cable ROUTER 1-PORT T1 VOICE FIC cable (100-ohm balanced STP) Network connector Operating mode CT1 ISDN PRI 4-57

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3Com Router Module Guide
Chapter 4
4-57
DB-15
Network interface
RJ-45
RJ-45
120-ohm balanced
120-ohm E1
trunk cable
twisted pair cable
connector
Router
Voice
Device
DB-15
Network interface
RJ-45
RJ-45
120-ohm balanced
120-ohm E1
trunk cable
twisted pair cable
connector
Figure 4-55
Extend an E1 120-ohm balanced twisted-pair cable
If the impedance of the to-be-connected port is 75-ohm,
Use a 75-to-120-ohm adapter for connection.
Step 3: Power on the router, and check the behavior of the LINK LED on the ROUTER
1-PORT E1 VOICE FIC panel: OFF means fault occurs on the line. Check it for the
cause.
4.17
ROUTER 1-PORT T1 VOICE FIC
4.17.1
Introduction
ROUTER 1-PORT T1 VOICE FIC, the 1-port T1 voice interface card, is intended for
handling dense signals in a VoIP system. It delivers the VoIP function on T1 lines.
The ROUTER 1-PORT T1 VOICE FIC comprises one motherboard and one daughter
card, providing a CT1/PRI interface for handling 24 channels of voice signals.
4.17.2
Interface Attributes
The following table describes the ROUTER 1-PORT T1 VOICE FIC interface
attributes.
Table 4-37
Interface attributes of the ROUTER 1-PORT T1 VOICE FIC
Attribute
Description
Connector
DB-15
Number of connectors
1
Cable
ROUTER 1-PORT T1 VOICE FIC cable (100-ohm balanced
STP)
Network connector
Operating mode
CT1
ISDN PRI