User's Manual

R-TRON Proprietary & Confidential Page 8

The SNMP Board located in the HB 1900 cabinet which is the essential of the HB 1900.

The SNMP board contains powerful microprocessors.

Operational parameters, such as Heartbeat interval, Modem Attenuation, SNMP version, Site ID,

etc. are set using a desktop or notebook and OMT, which communicate, locally via RS-232C

cable, with the RRMS. Remote operation is performed via CDMA net

* Connection *

Port Connected to

J1 SNMP Board Vcc

J4 Debugging port

J5 ATTEN Module Vcc & Control

D-SUB 9PIN Local OMT

* LED *

LED

TxD Display communication status between Modem &SNMP Board

RxD Display communication status between Modem &SNMP Board

OPR Turn on a light in Heartbeat Range

RDY Turn on a light when modem power is on

3.4 AC/DC Power Supply Unit

PSU receives and converts input power (AC 110V) into DC +5V.