NEC
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NEC750300-REF
NEC Electra Elite 48/192 ECR-U10 ETU Board/Card External Control Relay Unit (Refurbished)
NEC ECR-U10 ETU Board/Card External Control Relay Unit
The External Control Relay ETU provides common audible tone signaling using relay contacts for external ringing equipment, an audio output for external paging systems, and connection for external background music. Ten relays are provided: four for External Tone Ringer Control, one for Night Chime, three for External Paging, and two for General Purpose.
Key Features:
- Mfr. Part #: 750300
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