Specifications

A-10 Cisco MGX 8220 Reference, Release 4.1
External Alarm Cabling
TableA-16 T1 Connector Pin Assignments for EXT. TMG.
E1 Clock Cabling
T3E-B, T3E3-D, or SMF-155
TableA-17 E1 Clock Cabling—T3E3-B
TableA-18 E1 Connector Pin Assignments for EXT.TMG (unbalanced)
External Alarm Cabling
This cable (refer to Table A-19) is for connecting network alarm outputs to the LM-BNM ALARM
OUTPUT connector only. Table A-20 lists the pinouts for the network alarm outputs.
TableA-19 External Alarm Cabling
Pin No. Description
1
2 Transmit Pair Shield
3 Receive, Tip
4 Receive Pair Shield
9
11 Receive, Ring
Cable Parameter Description
Cable Type 75-ohm coax cable for unbalanced connection. One cable pair (1receive) per
E1 clock input.
Cable Connector: One female BNC for unbalanced connection; male DB15 for balanced
connection.
Max. Cable Length: Approx. 100 meters maximum between the MGX 8220 shelf and the first repeater
or CSU. Equalizer for cable length.
Connector Description
Rx BNC Receive E1 from trunk
Cable Parameter Description
Interface: Dry-contact relay closure.
Wire: 24 AWG, shielded, 6-pair.
Connector: DB-15, Subminiature, male.