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Wheelock CA-312-1 - Common Audible Control Units - 3 CO Line Wheelock CA-622-1 - Common Audible Control Units - 6 CO Line
CA Common Audible Control Units monitor multiple analog telephone lines (tip and ring) to provide all call signaling, zoned signaling or night bell connection. These control units also enable connection for operation of external audible or visual alerts to be operated directly off the telephone ring voltage output.

Available features and options:
* UL Listed
* Enables key systems to have a dry contact closure to trigger other devices
* Easy connection to Cooper Wheelock dry contact interface
* Choice of two outputs for alert signal connections: standard ringing voltage or contact closure

CA Common Audible Control Units monitor multiple analog telephone lines (tip and ring) to provide all call signaling, zoned signaling or night bell connection. These control units also enable connection for operation of external audible or visual alerts to be operated directly off the telephone ring voltage output.

Available features and options:
* UL Listed
* Enables key systems to have a dry contact closure to trigger other devices
* Easy connection to Cooper Wheelock dry contact interface
* Choice of two outputs for alert signal connections: standard ringing voltage or contact closure

Panasonic BTI KX-TAW84870 4-Port Hybrid Extension Card
- Panasonic 4 port hybrid line card (HLC4)
~~- 4 Ports per card
- Supports KX-T7700 (APT) series telephones, single line and DSS console, 2 port cell station and DPITS voice mail
- Maximum one per system

KXTAW84870