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DIRECT DIALLING INTERCOM (ANALOGUE)

Direct Dial analogue intercom(s) (VDL-4xx & HPU-5Dx) are used to call a remote telephone via PABX/PBX connection.

VMI SERIES INTERCOM (ANALOGUE)

VMI Series analogue, standalone intercom system. Up to four intercom endpoints (VSL-251) type.

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