Toshiba 3-DTMF/ABR Tone Detection Receiver QRCU1A
- (Stock# QRCU1A)
- 1 per system required of connection of DTMF standard telephones. Direct Inward System Access (DISA) lines, and voice mail devices. Also provides busy tone detection for ABR. The QRCU3 mounts inside the KSU. required when using QSTU Compatible with DK8 phone systems only.
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