Teo NT1B-300 Rack - Manual (Page 4)

Tone Commander NT1B-300 Rack Installation Instructions
Page 4 13-280113 Rev. B
Cable Connections
Back Panel Connectors
All rack S/T and U ribbon connectors are female; male connectors are required on the cable
ends.
U lnterface
Connect each U interface pair from the network interface block into the appropriate position on the 50-pin U
interface connector on the rack rear panel. See Table 2 for connector pinouts. 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 NT1B-300TC units – 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 on each NT1, 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 cross-
connect blocks in the order shown in Table 1. Note that pairs 1-2 and 3-6 for T568A jacks are reversed
from T568B jacks.
Wire Color
Pin # Signal
T568 A
T568 B *
(AT&T)
5 Tx- WHT-BLU WHT-BLU
4 Tx+ BLU BLU
1 unused WHT-GRN WHT-ORN
2 unused GRN ORN
3 Rx+ WHT-ORN WHT-GRN
6 Rx- ORN GRN
7 -48V WHT-BRN WHT-BRN
8 -48VRTN BRN BRN
Table 1 – Modular Jack Pinout