Telos Zephyr Xstream - Manual (Page 354)

USER’S MANUAL
Appendix 9 – Modular Cable Guide 342
ISDN S Interface Cable Pin‐out
The S interface is standardized around the world and in most countries is the only designated
ISDN termination for end users. It specifies an 8‐ conductor 8‐ position miniature modular (RJ‐
45 style) plug with 4 pairs as shown below (Identical to TIA/EIA‐ 568‐ A T568A). Unshielded
twisted pair category 3 (or higher) cable should be used. We recommend category 5 cable. The
cable details are shown below:
BRI S Interface cable.
Note: Pin 1 is to the left when viewed as above (with pins facing you and at the top).
ISDN S interface cable (Worldwide)
PIN COLOR DECRIPTION PIN
1 White/ Green PS 3 power +/ground (Optional) 1
2 Green PS 3 power - (Optional) 2
3 White/Orange Xmt (TE to NT1) to Network + 3
4 Blue Rcv (NT1 to TE) from Network + 4
5 White/Blue Rcv (NT1 to TE) from Network - 5
6 Orange Xmt (TE to NT1) to Network - 6
7 A White/Brown PS 2 Power 48 VDC – (Optional) 7
8 B Brown PS 2 Power +/ground (Optional) 8
Note A – Not used in Telos products
Note B – Optional, not required if remote PS2 power is not needed
ISDN S interface cable wiring diagram. Both ends are wired
identically.
h
HOT TIP
This cable has 4 twisted pairs wired “straight through” just like many cables
normally used for Ethernet 10Base- T. The wiring configuration is the same as
TIA/EIA- 568- A T568A (T568B is electrically equivalent).