Cisco Systems MGX 8220 Alarm Output Connection, Making External Clock Connections, Attaching a Control Console

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Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter
Alarm Output Connection
Alarm Output Connection
Dry contact relay closures are available for forwar ding MGX 8220 alarms to a user office alarm system.
Separate visual and audible alarm ou tp u ts a re availab l e f or b o th ma jor and minor alarm outputs. Th e
MGX 8220 alarm outputs are available from a DB15 connector on the BNM line module faceplate . See
Appendix B, “Specifications,” for the pinouts on this connector. Use switchboard cable for running
these connections.
Making External Clock Connections
If the MGX 8220 node is to be synchronized to some other external equipment or a local digital central
office, a connector on the back car d can b e u s ed t o prov id e a clock input.
For a T1 clock input, the DB 15 c o nn e c tor marked EXT TMG on th e T 3 E 3 -D or S M F-155 line module
is used.
For a E1 clock input, the BNC connector marked EXT TMG on the T3E3-B or SMF-155 line module
is used.
Attaching a Control Console
The control console can be attached to either the maintenance port or to the control port.
Dumb Terminal onto the Maintenance Port
When using an alphanumeric (dumb) terminal to input command-line inter face commands, the terminal
must be connected directly (no modem) to the maintenance port DB25 connector on the ASC line
module faceplate. Use a conventional R S -23 2 c a b le w ith a D B2 5 co n ne cto r at ea ch end. A so-called
“Null Modem” cable is not required. Th is port should never be Y-cabled.
Workstation onto the Control Port
When using a workstation to issue com mands or transfer files to and from the s helf, the workstation can
be attached through the RS-232 control port on the ASC line module faceplate. Using this connection
requires the workstation to communicate using TCP/IP and SLIP communication protocols.
The workstation can be attached eith er di re ctly wit h no m odem s or rem ote ly t hr ough m odem s. I n eit her
case, a conventional RS-232 modem cab le sh ou ld b e used.
If the shelf has dual redundan t ASC modules, use a Y-cable to connect the workstation or modem to the
control port of both the ASC modules. If a modem is used, a nu ll -modem cable is re qu ir e d .