Specifications

B-8
Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
AppendixB 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.