Comtech EF Data SNM-1002 - Manual (Page 20)

SNM-1002 LinkSync™ Modem Revision 2
Introduction MN/SNM1002.OM
1–2
1.2 Mode of Operation
The SNM-1002 is an integral component of the MIDAS Network Management System
(NMS), providing the LinkSync™ monitor and control communication between the NMS
and the MIDAS network.
LinkSync™ provides three key functions for the MIDAS network.
• Automatic Frequency Control (AFC) for all modems within the network.
• Power Management for all active traffic circuits within the network.
• Circuit Disruption capability which allows the NMS to terminate circuits
between any two internal traffic nodes (SNM-1010/1010L)in the network.
The SNM-1002 performs a critical roll for each of these three LinkSync™ capabilities
under the direct control of the MIDAS NMS. Refer to Chapter 4. Theory of Operation.
T RANS MI T RECEI V E TR ANSMI T RECE I VE COM MON S TO RED
P O WER O N T RANS MITTE R ON CA RRIE R DET ECT T EST MO DE
A
L
A
R
M
S F
A
U
L
T
S ENT ER
CLE AR
S D T - 1 2 0 0 S A T E L L I T E T E R M I N A L
E NTE R
C LEA R S N M - 1 0 0 1 N e t w o r k C o n t r o l M o d e m
RFT
EIA-422
EIA-232
EIA-232
ETHERNET
OPERATOR
WORKSTATION NMS
CONTROLLER
NETWORK CONTROL MODEM
(SNM-1001)
IF
(50-180 MHz)
LinkSync MODEM
(SNM-1002)
T M
OPTIONAL PRINTER
(USER SUPPLIED)
Figure 1-2. Typical NMS Configuration