Modem User's Guide
Table Of Contents
- Contents
- Warranty, Sales, and Service Information
- About This Guide
- About the Model 7986 Standalone Termination Unit
- Using the Asynchronous Terminal Interface
- Initial Startup and Configuration
- Monitoring the Unit
- Testing
- Messages and Troubleshooting
- Security
- IP Addressing
- Configuration Option Tables
- Standards Compliance for SNMP Traps
- Cables and Pin Assignments
- Technical Specifications
- Glossary
- Index
Cables and Pin Assignments
C-2
7986-A2-GB20-00September 1998
E1 Network Interface
The E1 network interface is either two BNC connectors (Transmit and Receive)
for a 75-ohm unbalanced interface, or an RJ48C, 8-position, unkeyed modular
connector (Table C-1, Figure C-1) for a 120-ohm balanced interface.
Table C-1. E1 120-Ohm Balanced Interface
Connector
Signal
Pin Number
Receive Ring 1
Receive Tip 2
Receive Shield 7
Transmit Ring 4
Transmit Tip 5
Transmit Shield 8
Figure C-1. E1 120-Ohm Network Interface Adapter Cable
(Feature Number 3100-F1-517)