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Appendix A
Cabling Summary
Transmit direction is toward the T1 trunk.
Note
E1 Cabling
BNC Connector
E1 trunk cables connect the customer DSX-1 crossconnect point or E1 channel service unit to the
MGX 8220 node at the FRSM E1 back card (BNC-4E1). (See Table A-5 and Table A-6.)
Table A-5
Cable Parameter
Cable Type: BNC-4E1
Cable Connector
Max. Cable Length
Table A-6
Connector
Rx BNC
Tx BNC
DB-15 Connector
E1 trunk cables connect the customer DSX-1 crossconnect point or E1 channel service unit to the MGX
8220 node at the FRSM E1 back card (DB15-4E1). (See Table A-7 and Table A-8.)
Table A-7
Cable Parameter
Cable Type: DB15-4E1 Western Electric 22 AWG, ABAM individually shielded twisted
Cable Connector
Max. Cable Length
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
E1 Trunk/Circuit Line Cabling Specification
Description
75-ohm coax cable for unbalanced connection. Two cables/pairs
(1 transmit, 1 receive) per E1 line.
Two female BNC for unbalanced connection; male DB15 for balanced
connection. See Tables A-2 and A-3 for pinouts.
Approx. 100 meters max. between the MGX 8220 shelf and the first
repeater or CSU. Equalizer for cable length.
E1 Connector Pin Assignments (unbalanced)
Description
Receive E1 from trunk
Transmit E1 to trunk
E1 Trunk/Circuit Line Cabling Specification
Description
pair (120-ohm balanced). Two pair per T1 line (one transmit and
one receive).
Male DB-15 subminiature.
533 ft (162 m) max. between the MGX 8220 shelf and the first
repeater or CSU. Selection of cable length equalizers.
Cisco MGX 8220 Installation and Configuration
Frame Relay Cabling
A-3
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Table of Contents
Troubleshooting
