User Manual
Table Of Contents
- Trademarks
- About this Manual
- Federal Communications Commission Radio Frequency Interference Statement
- Warranty and Customer Service
- Customer Service, Product Support Information, and Training
- 4205 System Description
- Microwave Path Engineering Basics
- Engineering Guidelines
- Network Turnup Procedure
- User Interface Guide
- Troubleshooting Guide
Section 3, Engineering Guidelines TRACER 4205 System Manual
28 © 2002 ADTRAN, Inc. 612804205L1-1A
Alarm Contacts
Normally open (NO) and normally closed (NC) alarm contacts are provided on the rear panel of the
TRACER 4205 system. In normal operation, the NC contact is electrically connected to the common
contact (COM) and the NO contact is isolated. During an alarm condition, the NC contact becomes
isolated and the NO is electrically connected to COM. This allows alarm conditions to be reported to
external alarm monitoring systems.
DS3 (In and Out) Connection
The physical DS3 interface is provided by a pair of 75 Ω BNC connectors for transmit and receive.
RS-232 Connection (Terminal Use)
The RS-232 connector provides a female DB-25 terminal connection (wired as a DCE interface), which is
used for terminal access to the TRACER 4205 system. The RS-232 port provides the following functions:
• Accepts EIA-232 input from a PC or terminal for controlling the TRACER 4205 system
• Operates at 9600 bps
Table 5 on page 29 shows the pinout. Wiring diagrams for connecting to the RS-232 connector (for various
applications) are provided following the pinout.
Connector type Terminal Block
Table 4. Alarm Contact Connector Pinout
PIN NAME DESCRIPTION
1 COM COMMON CONTACT
2 NO NORMALLY-OPEN CONTACT
3 NC NORMALLY-CLOSED CONTACT
The shielding on both BNC connectors are grounded per ANSI T1.404.