DSL
60
SmartNode 4650 ADSL2+ Getting Started Guide
D • Port pin-outs
DSL
Note
Pins not listed are not used.
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 14
).
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.
Table 13. RJ-11 connector
Pin
Signal
1
No connection
2
Tip
3
Ring
6
No connection
Table 14. RJ-45 socket
Pin
Signal
3
Rx+
4
Tx+
5
Tx-
6
Rx-
