Paradyne CPX-1000 manual Attach the STS-1 Cables, STS-1 Cable ConnectionsΩ

3. Installing the CPX-1000 1000-A2-GN22-00

Step 3

Attach the STS-1 Cables

On the RJ-21X connector, the tip connectors are on the left; the ring connectors are on the right. T1 circuits are numbered from 1 through 12, descending down from the top of the connector. Circuit number 1 transmits on tip pin 1 and ring pin 26; it receives on tip pin 2 and ring tip 27. The numbering and transmit receive scheme continues to the bottom; pins 25 and 50 are unused. A complete table of circuits, pin function and wire color by pin is provided in Appendix B, Pin Assignments and Indicators.

Connect the T1/DS-1 spans to the T-1 transition modules in the back of the CPX shelf.

The CPX connects to the Class 5 switch via two STS-1 cables connected from the STS-1 Splitter Assembly.

Each STS-1 module includes a corresponding STS-1 transition module that is accessible from the rear of the shelf. Each STS-1 Transition module connects to the Splitter Assembly with two cables, Transmit and Receive.

Table 3–1describes the connectors functions.

Note

STS-1 cables require coaxial 75 plus or minus 5% cable with BNC connectors on the CPX end for these

connections. To facilitate the connections, label each
cable by its destination port at the host Class 5 switch.
Table 3–1. STS-1 Cable ConnectionsΩ
Connection	Function
TX1	Transmit cable to primary STS-1 Transition Card
To Net	Transmit STS-1 cable to PSTN
TX2	Transmit cable to standby STS-1 Transition Card
RX1	Receive cable from primary STS-1 Transition Card
From Net	Receive STS-1 cable to PSTN
RX2	Receive cable from standby STS-1 Transition Card

3-30 February 2003