Communication Systems Archives - KCG

  • What is a PBX Phone System?

    PBX stands for “private branch exchange” which is a telephone exchange or switching a private organization and performs concentration...

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  • What is a DID?

    Direct Inward Dialing (DID) is a service of a local phone company (or local exchange carrier) that provides a...

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  • What is a trunk?

    A trunk is a single transmission channel between two points.

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