Difference between revisions of "FBSAR - Audio Interface Unit"
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== Connectors and Switches == | == Connectors and Switches == | ||
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[[Category:AlphaCom E System]] | [[Category:AlphaCom E System]] | ||
Revision as of 08:28, 27 June 2007
Features
- Provides interface to non-selective radio systems (1 base station)
- Two relays for busy marking of external equipment and transmitter keying
- Two optocouplers, which may be used for mutual busy marking
- Provides interface to PA systems (2 PA zones)
- DC termination of two subscriber outputs
- Two filters to remove carrier for display data signals on two subscriber audio outputs
- Second channel may be used as filter / PA adapter only
- Galvanic separation between the exchange and the external equipment
- +24 V supplied from the exchange via Power Distribution Board, needed only if the relays are used.
Description
The schematics for the boards are in Chapter 23 from page 273 onwards. This Filter Board and Speech Adapter with relay provides interface to PA systems. It has filters that remove the display data carrier from the audio. In this way excessive heating of power amplifiers is prevented. It also provides DC termination of subscriber outputs (corresponding to non-display stations).
For interface to non-selective mobile radios, it provides two relays that are controlled by RCO /c-wire for busy marking of the external equipment and control of transmitter keying. There are also two optocouplers that can be used for mutual busy marking.
The board has two audio transformers that provide galvanic separation between the intercom exchange and the external equipment.
The relays use +24 V from the exchange. If the relays are not used, no power is required.
The FBSAR is fastened onto the mounting rail on the connection field of the AlphaCom exchange. In the TouchLine Compact exchanges, a mounting rail must be fastened to a standard mounting bracket.
