Table of Contents
Advertisement
Frame Relay Cabling
Table A-8
Pin No. Description
1
2
3
4
9
11
Note
Transmit direction is toward the E1 trunk.
X.21 Port Connectors
The X.21 ports use DB-15 female connectors (DCE type according to ISO 4903.) (See Table A-9.)
Table A-9
Pin No.
2
9
4
11
6
13
5
12
3
10
8
1
HSSI Port Connectors
The HSSI (High-Speed Serial Interface) port uses a female SCSI-II connector (connector type
according to ANSI/TIA/EIA-613). (See Table A-10.)
Cisco MGX 8220 Installation and Configuration
A-4
E1 Connector Pin Assignments
Transmit, tip
Transmit, pair shield
Receive, tip
Receive, pair shield
Transmit, ring
Receive, ring
Pinouts for X.21 DB-15 Connectors
Name
Signal Function
TA
Transmit data
TB
RA
Receive data
RB
SA
Clock
SB
IA
Indication
IB
CA
Control
CB
SG
Signal ground
FG
Frame ground
Polarity
Signal Source
+
DTE
-
-
DCE
-
+
DCE
-
+
DCE
-
+
DTE
-
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix A
Cabling Summary
Advertisement
Table of Contents
Troubleshooting
