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
_
9
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