Cisco 1760 Hardware Installation Guide - Page 81

Cables and Pinouts for 2-Port ISDN BRI Card

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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-5 lists 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.) 78-13342-03 Cisco 1760 Modular Access Router Hardware Installation Guide B-5

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B-5
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
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-5
lists
the pinouts for the E&M connector.
Note
Pins that are not used should not be connected.
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
.)
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