Stentofon intercom systems after 1990 and still sold today .
Zenitel, Stento, Stentofon , Vingtor Marine AlphaCom / ACM ( Stentofon AlpaCom inside )
Stations with or without display . All VMP / Stentofon stations can be used. Star wireing configuration - 4 wires separately to every station.
The ACM / AlphaCom is a smart choice when your VMP / MPC exchange has to be replaced . Standard sizes: 138 , 80 and 36 (AlphaCom M) .
The Stentofon AlphaCom / Vingtor Marine ACM ( AlphaCom inside ) was introduced in the early nineties and these exchanges are still sold today . They are compatible to the MPC / VMP system stations and wireing . It's also easier to connect display stations to the AlphaCom / ACM system . Like the MPC / VMP exchanges with PMF / PMF-R proccesorboards, the AlphaPro / ACM exchange has an "userdata Backup / Restore" procedure , to make a backup on onboard eeprom(s) .
The most important notice!
Power OFF when plugging !
Like replacing boards in a computer , to avoid serious damage on the exchange electronic boards allways turn off the power before replacing any board in the exchange !!
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About soldering tools : Transformer insulated and temerature controlled soldering iron only , set temp to around 275 deg. Celsius
Common problems : Backup battery on the AMC board .
General programming preparation , what must be known before programming .
Sorting out what's inside the exchange : Version of running software on the proccessor board., standard boards / extra function boards, internal wireing schematic to local terminal numbers .
What's connected to the exchange : stations , stations catalog number , remote equipment and other hardware connected , ref. to terminal numbers inside the exchange .
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Programming : by using a pc with AlphaPro software . To make meaningful programming , repeated training and good system knowledge is a must .
AMC board service hints . Long distance direct programming using a modem . ( Using a standard telephone line )
AMC board service hints . Easy service. Changes in the programming .
Note! It's a must to have a permanent backupfile available . AMC backup battery lifetime often is found to be less than 10 years !
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Have a backup ready before replacing the battery on the AMC board.
Backup to flash eeprom on the AMC board ( 28F010 ) = Dial from Super User : 7820 + M .
It's smart to make an extra backup on a new flash eeprom ( 28F010 ) = Dial from Super User : 7820 + M .
Measure the 3.6Volts backup battery , in case of low battery voltage or old battery it must be replaced .
Restart.
Restore from backup = Dial from Super User : 7819 + M
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Filterboards : GND connection failure . Easy to repair.
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AlphaCom / ACM : extra function boards & related info.
FBSAR ( Filter Board Speach Adapter Relay ) is a typical extra function board to adapt a PA system to the AlphaCom / ACM exchange.
NOTE!: RCO's uses positive logic, ( Off = 0VDC , ON = +5VDC )
subscriber connection board w / RCO connector SUBCB