Nortel CS 1000 Series Installation And Commissioning Manual page 75

Table 17
S/T interface connector specification (cont'd.)
Pin number
U interface specification
The U interface uses a 2-conductor, twisted pair cable terminated with
an RJ-45 type jack. An RJ-45 type jack on the NT1 device connects the
terminal to the DSL using this twisted pair cable.
The connector pin assignments for the jack and the plug are shown in
Table 18 "U interface connector specification" (page
shows signal names for each interface pin at the UILC and at the terminal.
Table 18
U interface connector specification
Pin number
Copyright © 2003-2009 Nortel Networks
.
RJ45 jack
pin signal name
7
Power Sink 2 (-)
8
Power Sink 2 (+)
Note 1:
Power Source 1 (PS1): Up to 2 Watts of power is supplied by
the SILC to the terminals on the DSL. This power is simplexed over the
TX and RX pairs provided by -48 V (-40 V for Europe) supply on the
SILC. The RX pair is positive with respect to the TX pair.
Note 2:
Power Sink 2 (PS2) provides an optional means of powering
the terminal from a common supply in the wiring closet.
Note 3:
Power Source 3 (PS3) provides the power from the terminal to
the NT1 if the NT1 does not have a local power source.
RJ45 jack
pin signal name
1
Not used
2 Not used
3 Not used
4
Tip or Ring
5
Tip or Ring
6 Not used
7
Not used
8
Not used
Nortel Communication Server 1000
ISDN Basic Rate Interface Installation and Commissioning
NN43001-318 03.01
11 May 2009
Installation procedures 75
SILC
signal name
No connection
No connection
75). The table also
UILC
signal name
No connection
No connection
No connection
Tip or Ring
Tip or Ring
No connection
No connection
No connection