Frame Relay Cabling; T1 Cabling - Cisco MGX MGX 8800 Hardware Installation Manual

Appendix
Table B-18
Cable Parameter
Type
Maximum length
Connector
See
Table B-19
Connector
Rx SMB
Tx SMB

Frame Relay Cabling

This section describes the cabling and connector pin assignments for the Frame Relay cards.
The Frame Relay Cabling section does not apply to the MGX 8950 switch or MGX 8880 gateway.
Note

T1 Cabling

T1 trunk cables connect the customer DSX-1 cross-connect point or T1 channel service unit (CSU) to
the Cisco MGX 8850 or MGX 8830 switch at the T1 back card.
See
Table B-20
Cable Parameter
Cable type
Cable connector
Maximum cable length
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
E3 Trunk Cable and Connector Information
Description
75-ohm coaxial cable (RG-59 B/U for short runs, AT&T 734A for longer
runs). Two per E3 line (transmit and receive).
100 feet between the Cisco MGX 8850 switch and the CS/DSU.
450 feet maximum between the Cisco MGX 8950 switch and the DSX-3.
Terminated in male SMB. Rx is received from trunk; Tx is transmitted to
trunk.
Table B-19 for details on SMB pin functions.
E3 Connector Pin Functions
Description
Receive E3 from trunk
Transmit E3 to trunk
Table B-20 for T1 trunk cable and connector information.
T1 Trunk/Circuit Line Cable and Connector Specifications
Description
Western Electric 22 AWG, ABAM individually shielded twisted pair (100
ohm balanced). Two pair per T1 line (one transmit and one receive).
RJ-48C male.
655 feet (199.64 meters) maximum between the Cisco MGX 8850 or
MGX 8830 switch and the first repeater or CSU. A selection of cable
length equalizers is available.
(Figure B-7 illustrates the RJ-48 connector schematic.)
Cisco MGX 8800/8900 Series Hardware Installation Guide
Frame Relay Cabling
B-17