APC - AlphaCom Program & Clock Board
From Zenitel Wiki
Features
- System master clock (two-phase - 16.384 Mhz) and module reset
- Circuitry for 6 audio program feed channels
- Can be fed by any analog source
- Galvanic isolated input via 600 ohm transformer to avoid noise problems
- Adjustable sensitivity (gain)
- 6 alarm inputs
- 2 internal alarms
- Fan control
- Coded connector to ensure correct positioning in the module
- Power connector (6-pin socket source) for hot plug-in cable
Description
The AlphaCom exchange needs this board to run. It controls the back plane board clocking. It also supervises board temperatures and controls the speed of the fans. This board contains circuitry for 6 audio program feed channels with galvanic isolation. Easily accessible potentiometers at the front enable sensitivity control of the audio program input. The clock can be synchronized with (phase-locked to) an external clock. The board plugs into position 26 only.
