Installation guide

A-74 Cisco 4000 Series Installation Guide

Serial Cables

E1-G.703/G.704 Cable Pinouts

Table A-26 shows the signal pinouts for each type of E1-G.703/G.704 interface cable. All

cables use a DB-15 connector at the G.703/G.704 network processor module end.

Table A-26 E1-G.703/G.704 Adapter Cable Connector Pinouts

The adapter cables for balanced mode are available with several connector types to

accommodate connection standards in different countries. You must use the proprietary

cables to connect the E1-G.703/G.704 port to your network. Cables for balanced and

unbalanced modes are available with the following types of network-end connectors:

• Unbalanced (75-ohm) coaxial cables with BNC connectors at the network end (used

primarily for connection in the United Kingdom).

• Balanced (120-ohm) with a DB-15 connector at the network end.

• Balanced (120-ohm) twinaxial split cable at the network end, with separate transmit and

receive cables, each with a twinax connector.

1. Any pins not described in this table are not connected.

2. TX = transmit; RX = receive.

E1-G.703/G.704 Network

Processor Module End Network End

DB-15

Null Modem

DB-15 BNC Twinax

Pin Signal

Pin Pin Signal Pin Signal

9 TX Tip 1 3 TX Tip Tip Signal

2 TX Ring 9 11 TX Shield Ring Signal

10 TX Shield 2 4 – Shield Shield

8 RX Tip 3 1 RX Tip Tip Signal

15 RX Ring 11 9 RX Shield Ring Signal

7 RX Shield 4 2 – Shield Shield