ISDN BRI 0/0 (NT/Net or TE/User) port
49
VOE21x Getting Started Guide
C • Port pin-outs
ISDN BRI 0/0 (NT/Net or TE/User) port
The BRI phone port uses an 8-pin RJ-45 connector (the pinout is shown in
table 7
).
Note
Pins not listed are not used.
Note
All pins between the port BRI 0/0 and the port BRI 0/1 are connected during
power failure. Fallback relay operation:
•
When the unit is not powered, the fallback relay connects pins 3, 4, 5, and 6 of the net
and the user ports (fallback) together. This enables you to place calls to the PSTN even if
the unit is powered down.
•
Line power applied to the Line port is fed through to the Phone port at all times and
independent of the fallback relay’s status.
Note
On each ISDN BRI port in TE mode, it is possible to switch on ISDN line
power per software. The total amount of power is 4W. If a ISDN BRI port is
switched to NT mode, the ISDN line power is turned off.
ISDN BRI 0/1 .. 0/3 (TE/Usr or NT/Net)
The BRI Line port uses an 8-pin RJ-45 connector (the pinout is shown in
table 7
).
Note
All pins between the port BRI 0/0 and port BRI 0/1ports are connected during
power failure.
Note
On each ISDN BRI port in TE mode, it is possible to switch on ISDN line
power per software. The total amount of power is 4W. If a ISDN BRI port is
switched to NT mode, the ISDN line power is turned off.
Table 7. RJ-45 socket
Pin
Signal
3
Rx+
4
Tx+
5
Tx-
6
Rx-
Table 8. RJ-45 socket
Pin
Signal
3
Rx+
4
Tx+
5
Tx-
6
Rx-
