Specifications

A-4 Cisco MGX 8220 Reference, Release 4.1
Frame Relay Cabling
DB15 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). (Refer to Table A-7 and Table A-8.)
TableA-7 E1 Trunk/Circuit Line Cabling Specification
TableA-8 E1 Connector Pin Assignments
NoteTransmit direction is towards the E1 trunk.
Cable Parameter Description
Cable Type: Db15-4E1 Western Electric 22 AWG, ABAM individually shielded twisted pair
(120 ohm balanced). Two pair per T1 line (1 transmit and 1 receive).
Cable Connector: Male DB-15 subminiature.
Max. Cable Length: 533 ft. (162 m) maximum between the MGX 8220 shelf and the first repeater
or CSU. Selection of cable length equalizers.
Pin No. Description
1 Transmit, Tip
2 Transmit Pair Shield
3 Receive, Tip
4 Receive Pair Shield
9 Transmit, Ring
11 Receive, Ring