
B-8
Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Appendix B Cable Specifications
External Alarm Cabling
External Clock Input Cabling
The MGX 8230 has two external clock input connectors: a T1 RJ-45 connector and E1 SMB connector.
T1 Clock Cabling
The clock port can accept a T1 or E1 BITS clock input. (See Table B-15)
External Alarm Cabling
The external alarm cable connects to the Alarm connector on the PXM-UI card. See
Table B-16
for
physical characteristics of the cable and
Table B-17
for the pinouts.
Table B-14 RJ-45 Maintenance and Control Port Pin Assignments
Pin No.
Name
Description
1
RTS out
Request to Send
2
DTR out
Data Terminal Ready
3 TxD
Transmit
Data
4 GND
Signal
Ground
5
GND
Signal Ground
6
RxD Receive
Data
7
DSR
Data Set Ready
8
CTS
Clear to Send
Table B-15 7T1 Clock Cabling
Pin No.
Name
1
Tx ring out
2
Tx tip out
3
Ground
4
Rx ring in
5
Rx tip in
6
No comment
7
Test point ring out
8
Test point tip out
Table B-16 External Alarm Cabling
Cable Parameter
Description
Interface
Dry-contact relay closure.