T3/T4 Timing Connector; Figure 8-3: T3/T4 Connector, Pin Identification; Table 8-1: T3/T4 Connector, Pin Identification - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
8.4

T3/T4 Timing Connector

The T3/T4 timing connector is an RJ-45 connector located on the NPT-1020 panel and designated T3/T4.
The interface includes a group of lines that are usually connected to the site timing reference distribution
subsystem:
Clock input (T3 2.048 Mbps or 2.048 MHz signal, ITU-T Rec. G.703 interface; T3 1.544 Mbps or 1.544

MHz signal, ITU-T Rec. G.703 interface)
Clock output (T4 2.048 Mbps or 2.048 MHz signal, ITU-T Rec. G.703 interface; 1.544 Mbps or 1.544

MHz signal, ITU-T Rec. G.703 interface)
The following figure identifies the connector pins, as seen when looking into the connector. The table lists
the pin assignment for the connector. It also lists the color of the wire connected to the corresponding pin
in the cables offered by ECI for connecting between the tributary connector and a distribution frame.

Table 8-1: T3/T4 connector, PIN identification

Pin Name
1 CLK2MHZ_IN(A)
2 CLK2MHZ_IN(B)
3 CLK2MHZ_OUT(A)
4 CLK2MHZ_OUT(B)
5 CLK2MBIT_IN(A)
6 CLK2MBIT_IN(B)
7 CLK2MBIT_OUT(A)
8 CLK2MBIT_OUT(B)
ECI Telecom Ltd. Proprietary

Figure 8-3: T3/T4 connector, pin identification

Function
2.048/1.544 MHz clock
input
2.048/1.544 MHz clock
output
2.048/1.544 Mbps clock
input
2.048/1.544 Mbps clock
output
Direction Wire color
Input Blue/White-ring
Input White/Blue-ring
Output Green/White-ring
Output White/Green-ring
Input Brown/White-ring
Input White/Brown-ring
Output Orange/White-ring
Output White/Orange-ring
Connection Data
8-2