Cisco Systems 78-13342-03 Cables and Pinouts for 2-Port Isdn BRI Card, Pin Signal Description

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Appendix B Cabling Specifications

Cables and Pinouts for 2-Port ISDN BRI Card

The E&M VIC pinout depends on the PBX type and connection. Table B-5lists the pinouts for the E&M connector.

Note Pins that are not used should not be connected.

Table B-5 E&M Pinouts

Pin

Signal

Description

 

 

 

1

SB

–48V signaling battery

 

 

 

2

M-lead

Signaling input

 

 

 

3

R

Ring, audio input

 

 

 

4

R or R1

Ring, audio input/output,

 

 

or output

 

 

 

5

T or T1

Tip, audio input/output,

 

 

or output

 

 

 

6

T

Tip, audio input

 

 

 

7

E-lead

Signaling output

 

 

 

8

SG

Signaling ground return

 

 

 

Cables and Pinouts for 2-Port ISDN BRI Card

Use the straight-through RJ-45 cable to connect the 2-port ISDN BRI card to an ISDN network through a telephone wall outlet or other device.

Note When an interface configured as network termination (NT) is connecting to a terminal equipment (TE) device, the cable must have the transmit and receive pins swapped (crossover cable). (See Table B-6.)

 

 

Cisco 1760 Modular Access Router Hardware Installation Guide

 

 

 

 

 

 

78-13342-03

 

 

B-5

 

 

 

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Contents Ethernet Cables Cabling SpecificationsSpecification RJ-45 Pin Signal DirectionEthernet Network Cabling Guidelines 10BASE-T 100BASE-TXDTE Console Cable and AdapterVIC Cables and Pinouts Tip Pin SignalCables and Pinouts for 2-Port Isdn BRI Card Pin Signal DescriptionStraight-through cable Cable NT Interface TE Interface crossoverIsdn BRI NT/TE

78-13342-03 specifications

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