Cisco Systems MGX 8220 Manual

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A-5

Cisco MGX 8220 Installation and Configuration

Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003

Appendix A Cabling Summary

Frame Relay Cabling

Cabling for RJ-48 Connectors on T1 and E1 Ports

For back cards using RJ-48 connectors on T1 and E1 ports, each connector has

• Transmit tip pin

• Transmit ring pin

• Receive tip pin

• Receive ring pin

• Two pins for shielded ground

The pins are wired as shown in Figure A-2.

Table A-10 Pinouts for SCSI-II Connector

Pin No. Name Signal Function Polarity Signal Source

11 SD Send data + DTE

36 -

4 RD Receive data + DCE

29 -

6 ST Send timing +

31 -

2 RT Receive timing +

27 _

9TTTerminal timing+DCE

13 -

3CADCE available+DCE

28 -

8 TA DTE available + DTE

33 -

10 LA Loop ckt A + DTE

35 -

12 LB Loop ckt B + DTE

37 -

5 LC Loop ckt C + DCE

30 -

1,26,7,32,

13,38,19,

44,25,50

SG Signal ground