Appendix B Cable Specifications

Frame Relay Cabling

Figure B-1 RJ-48 Connectors

 

 

RJ-48 Pins

 

TTIP

IN

 

2

 

TRNG

IN1

RTIP

5OUT

RRNG

4OUT

3

6

shield shield

26270

E1 Cabling

SMB Connector

E1 trunk cables connect the customer DSX-1 cross-connect point or E1 Channel Service Unit (CSU) to the node at the FRSM E1 back card (SMB-8E1). See Table B-4and Table B-5.

Table B-4 E1 Trunk/Circuit Line Cabling Specification

Cable Parameter

 

Description

 

 

 

 

Cable Type

 

75-ohm coax cable for unbalanced connection. Two cables/pairs (1 transmit,

(BNC-8E1)

 

1 receive) per E1 line.

 

 

 

 

Cable Connector

 

16 female SMB for unbalanced connection. See Tables A-2 and A-4 for

 

 

pinouts.

 

 

 

 

Max. Cable Length

 

Approximately 100 meters maximum between the MGX 8230 node and the

 

 

first repeater or CSU. Equalizer for cable length.

 

 

 

 

Table B-5 E1 Connector Pin Assignments (unbalanced)

 

 

 

Connector

Description

 

 

 

Rx BNC

Receive E1 from trunk

 

 

 

Tx BNC

Transmit E1 to trunk

 

 

 

 

 

 

Cisco MGX 8230 Edge Concentrator Installation and Configuration

 

 

 

 

 

 

 

Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001

 

 

B-3

 

 

 

 

 

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Image 265
Cisco Systems MGX 8230 manual E1 Cabling, SMB Connector, Rx BNC Receive E1 from trunk Tx BNC Transmit E1 to trunk