B400P/BE400P on DAHDI User Manual
OpenVox Communication Co. LTD.
URL: www.openvox.cn
31
available. In most cases, power is
not provided
from the telephone
company.
BRI S-Interface
8-pin RJ45 port PIN
Color
Description
1
8
1
White/Orange
N/A
2
Orange
N/A
3
White/Green
4
Blue
Tr
5
White/Blue
Transmit
-
6
Green
Receive
-
7
White/Brown
-48VDC Power(optional)
8
Brown
-48VDC Return (optional)
The BRI S-Interface is a 4-wire interface, with separate Transmit and
Receive pairs. It can be operated in four modes:
Point-to-Point Mode allows one logical terminal that may be up to 1
KM from the NT-1
Short Passive Bus Mode allows connection of up to 8 terminals in
parallel on the S/T bus. The terminals can be within 100 to 200 meters
from the NT-1.
