A-3
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix A Cabling Summary Frame Relay Cabling
Note Transmit direction is toward the T1 t ru n k.
E1 Cabling

BNC Connector

E1 trunk cables connect the cus to mer D SX - 1 cr oss connect point or E1 channel service un it to t he
MGX 8220 node at the FRSM E1 back card (BNC-4E1). (See Table A-5 and Table A-6.)

DB-15 Connector

E1 trunk cables connect the custom er DSX-1 crossconnect point or E1 channe l service unit to the MGX
8220 node at the FRSM E1 back card (DB15-4E1). (See Table A-7 and Table A-8.)
TableA-5 E1 Trunk/Circuit Line Cabling Specification
Cable Parameter Description
Cable Type: BNC-4E1 75-ohm coax cable for unbalanced connection. Two cables/pairs
(1 transmit, 1receive) per E1 line.
Cable Connector Two female BNC for unbal anced con nectio n; male DB 15 for bal anced
connection. See Tables A-2 and A-3 for pinouts.
Max. Cable Length Approx. 100 meters max. between the MGX 8220 shelf and the first
repeater or CSU. Equalizer fo r cab le length.
TableA-6 E1 Connector Pin Assignments (unbalanced)
Connector Description
Rx BNC R ece ive E1 from trunk
Tx BNC Transmit E1 to trunk
TableA-7 E1 Trunk/Circuit Line Cabling Specification
Cable Parameter Description
Cable Type: DB15-4E1 Western Electric 22 AWG, ABAM individually shielded twisted
pair (120-ohm balanced). Two pair per T1 line (one transmit and
one receive).
Cable Connector Male DB-15 subminiature.
Max. Cable Length 533 ft (162 m) max. between the MGX 8220 shelf and the first
repeater or CSU. Selection of cable length equalizers.