Specifications

A-8 Cisco MGX 8220 Reference, Release 4.1
Control and Clock Cabling
TableA-12 AC Power Cables
Control and Clock Cabling
Maintenance and Control Ports
The control ports are used to connect one of the nodes in the network to a control terminal,
workstation, or modem connections for remote alarm reporting or system monitoring. Refer to
Table A-13 and Table A-14 for details on these cables.
TableA-13 Maintenance and Control Port Cabling
TableA-14 Maintenance and Control Port Pin Assignments
1.Used on control port cable only.
Cable Parameter Description
Cable: Provided with 8 feet (2.3 m) of 3-conductor wire with plug.
Plug: customer end 20 A NEMA L620, 3-prong plug (domestic)
13 A 250 Vac BS1363, 3-prong fused plug (UK, Ireland)
CEE 7/7 (Continental Europe)
AS3112 (Australia/New Zealand)
CEI23-16/VII (Italy)
Cable Parameter Description
Interface: RS-232 DCE ports.
Suggested Cable: 24 AWG, 25-wire. A straight-through RS-232 cable is used for a terminal or
printer connection. A null modem cable may be needed when interfacing with
modems on either port.
Cable Connector: DB-25, subminiature, male. Table A-14 contains a list of the port pin
assignments.
Max. Cable Length: 50 feet (15 m)
Pin No. Name Source Description
1 FG both Frame Ground
2 TxD DTE Transmit Data
3 RxD DCE Receive Data
4 RTS DTE Request to Send
5 CTS DCE Clear to Send
6 DSR DCE Data Set Ready
7 SG both Signal Ground
8 CD DCE Carrier Detect
18
1
LL DTE Local loop
20 DTR DTE Data Term Ready
21
1
RL DTE Remote loop
22
1
RI DCE Ring indicator