Appendix C. Cables
C–24
T1/ISDN
A T1/ISDN cable connects a T1/ISDN module to a T1 or
an ISDN PRI network.
Each T1/ISDN module provides two RJ-45 modular
jacks.
2
If a T1/ISDN module supports one interface, you
must use the jack next to the LEDs. If the module
supports two interfaces, you can use both jacks.
Each T1/ISDN module ships with one or two T1/ISDN
cables, depending on your order. Both ends of the cable
provide an RJ-45 modular plug.
Use the following specifications when building your own
T1/ISDN cable:
❐
Maximum length 655 feet (199.5 meters)
❐
Shielded
❐
Stranded
❐
24-AWG cable
❐
2-pair, twisted-pair inside telephone wire
2.
A T1/ISDN module uses RJ-45 signaling.