Teo NT1-296 Rack - Manual (Page 5)

13-102848 Rev. G Page 5
Cable Connections
NT1-296 RACK
S/T
Port
s
43 -
48
S/T
Port
s
37 - 42
S/
T
P
o
rts
31
-
36
S/T
Port
s
25 - 30
S/T
Port
s
19 - 24
S/T
Port
s
13 - 18
S/T
Port
s
7 -
12
S/
T
P
o
rts
1 -
6
U Lines
25 - 48
U Lin
e
s
1 - 24
POWER
Cards 1
+ 2
Cards 3
+ 4
Cards 5
+ 6
Cards 7
+ 8
Ca
rd
s
9 +
10
Cards
11 +
12
Cards
13 +
14
Cards
15 +
16
Back Panel Connectors
All rack S/T and U connectors are female; male connectors are required on the cable ends.
U lnterface
Plug each U interface cable from the network interface block into the appropriate 50-pin U interface
connector on the rack rear panel. See Table 2 for connector pinout. The rack uses self-locking connectors;
to remove a cable, use a small tool to press in the tabs on the ends of the connector.
S/T Interface
The S/T interface for each terminal can be connected one of two ways:
1. Modular jacks on the front of the NT1U-223TC cards – for terminal equipment or patch panel
connection via an 8-position modular phone cord. Connecting cords must be Category 3 or higher with
T568 A or T568 B wiring. See Table 1 and the figure below for jack pinout.
Two parallel-wired jacks are provided per NT1 circuit (3 sets per card), for two terminals connected in a
multipoint arrangement.
2. 50-pin ribbon connectors on the rack back panel – for terminal equipment connection via a punch-down
block. See Table 2 for connector pinouts.
Connect the terminal wall jacks to 4-pair cables as shown in Table 1. Punch down the cables to the
crossconnect blocks in the order shown in Table 1. Note that pairs 1-2 and 3-6 for T568 A jacks are
reversed from T568 B jacks.
Wire Color
Pin # Signal
T568 A
T568 B *
(AT&T)
5 Tx- WHT-BLU WHT-BLU
4 Tx+ BLU BLU
1 N/C WHT-GRN WHT-ORN
2 N/C GRN ORN
3 Rx+ WHT-ORN WHT-GRN
6 Rx- ORN GRN
7 -48V WHT-BRN WHT-BRN
8 GRD BRN BRN
Table 1 – Modular Jack Pinout
* T568 B (AT&T 258A) jacks are recommended; they allow conventional
station pair ordering when connecting to S/T punchdown blocks.