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ISDN BRI 0/1 .. 0/3 (TE/Usr or NT/Net) 54
SmartNode 4630 Getting Started Guide D • Port pin-outs
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 8).
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.
5 Tx-
6 Rx-
Table 9. RJ-45 socket
Pin Signal
3 Rx+
4 Tx+
5 Tx-
6 Rx-
Table 8. RJ-45 socket
Pin Signal