Specifications

A-6 Cisco MGX 8220 Reference, Release 4.1
Frame Relay Cabling
HSSI Port Connectors
The HSSI (High Speed Serial Interface) port uses a female SCSI-II connector (Connector type
according to ANSI/TIA/EIA-613). (Refer to Table A-10.)
TableA-10 Pinouts for SCSI-II Connector
Cabling for RJ-48 Connectors on T1 and E1 Ports
For back cards employing RJ-48 connectors on their 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 FigureA-2.
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 _
6 TT Terminal Timing + DCE
13 -
3 CA DCE 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