User's Manual Part 1

Table Of Contents
OPERATION 3EM21522AAAA
DTR-0200-SA-SIRIUS Issue 1, March 2008
5-36
5.7.1.4
Steps to Access the Repeater in Local Operating Condition via RS-232
1. Connect PC to RS-232 Console Port (SPU front panel) using a straight
cable.
2. Access the repeater via the HyperTerminal and using CLI commands.
The Modulator can also be directly accessed using an RS-232 Null
Modem cable connected to the Modulator RS-232 LOCAL PORT connec-
tor on the modulator back panel, and using CLI commands.
5.7.1.5
Remote Operation
Remote repeater access and communication is via V90 modem (RJ11) and a dial up
telephone line connected to the Network Management Center (NMC).
When an alarm occurs, the repeater’s main controller attempts to establish communi-
cation with the NMC through the dial up modem. If the phone line is busy, the con-
troller will retry after a pre-determined time period. Once the main controller finishes
sending all the traps to the NMC
, the controller switches to a slave mode. In the slave
mode, the controller waits for a connection to be established with the NMC using pre-
configured SNMPv3 parameters. This allows NMC to poll its parameters/status or
make changes to various system parameters.
5.7.2
Operating Modes
Operating mode configuration can occur in either of two main parameter groups;
Repeater Operating Mode parameters or Modulator Operating Mode parameters.
5.7.2.1
Repeater Operating Modes
In general, under no fault conditions, the repeater AC power up algorithm will restore
repeater operation to the existing mode condition prior to AC shutdown (if the
repeater was in Standby prior to AC shut down, upon reapplication of AC the repeater
would return to Standby). There are three repeater operating modes:
1). Standby mode
2). Broadcast mode
3). Manual mode
Mode selection is via the GUI Main Menu. From the Main Menu select Config =>
Repeater Operating Mode => Standby
, Broadcast, or Manual. See Figure 5 - 44.