SmartTrunk Systems SmarTrunk II, Обзор системы, Страница: 26 / 57

System Overview
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SYSTEM REQUIREMENTS
Operators considering a ST-510 Network Switch should first be thoroughly
familiar with the SmarTrunk II signaling protocol and basic operation, as de-
scribed in the operating manual for the ST-853 Trunking Controller. The ST-
510 system operates with the SmarTrunk II protocol using the same ST-853
controllers as a conventional SmarTrunk System; however, a new firmware
EPROM is required for each controller.
Each local SmarTrunk II controller is connected to the local ST-510 switch by
two links: an RS-232 data cable and an audio link from the controller’s line 1
TELCO port to the audio port of the ST-422 board assigned to that controller.
If the system has more than one site, an ST-100 multiplexers are used to
connect to remote ST-853’s. For PSTN or PBX interconnection, the ST-510 has
a conventional line termination for an analog TELCO line (2 wire, loop start).
The system power supply is available in 110 or 220 VAC (50/60 Hz) versions.
FEATURES AND SERVICES PROVIDED
Note: Some features are optional. Please see page 38.
Wide Area Roaming
The ST-510 supports two roaming scenarios:
•
Single ST-510 Switch:
It is most often the case to have a single ST-510 Network Switch support
multiple repeater sites. In this case, the SmarTrunk controllers (up to 128
maximum) are linked to a central ST-510 site. Different roaming areas may be
defined which correspond to the different repeater sites.
This is the most economical scenario because only one ST-510 switch is required
to support the entire network. There must however, be a link for each repeater/
ST-853 channel at the remote site(s). For more details, refer to page 37.