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  2. Trunking - Wikipedia

    en.wikipedia.org/wiki/Trunking

    Trunking in telecommunication originated in telegraphy, and later in telephone systems where a trunk line is a communications channel between telephone exchanges. Other applications include the trunked radio systems commonly used by police agencies.

  3. Trunked radio system - Wikipedia

    en.wikipedia.org/wiki/Trunked_radio_system

    NXDN Common Air Interface (CAI) was accepted at the meeting of the ITU-R (International Telecommunication Union Radiocommunications Sector) held in November 2016 and it has been added to Report M.2014-3, published in February 2017. It is an open, multi-vendor protocol widely adopted in mission-critical applications in Japan, USA and mainland ...

  4. Channel-associated signaling - Wikipedia

    en.wikipedia.org/wiki/Channel-associated_signaling

    Channel-associated signaling (CAS), also known as per-trunk signaling (PTS), is a form of digital communication signaling.As with most telecommunication signaling methods, it uses routing information to direct the payload of voice or data to its destination.

  5. SIP trunking - Wikipedia

    en.wikipedia.org/wiki/SIP_trunking

    SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities. [1]

  6. Main distribution frame - Wikipedia

    en.wikipedia.org/wiki/Main_distribution_frame

    Trunk cables may terminate on the same MDF or on a separate trunk main distribution frame (TMDF). Like other distribution frames the MDF provides flexibility in assigning facilities, at lower cost and higher capacity than a patch panel. The most common kind of large MDF is a long steel rack accessible from both sides.

  7. Telecommunications tariff - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_tariff

    A telecommunications tariff is an open contract between a telecommunications service provider and the public, filed with a regulating body such as state and municipal Public Utilities Commissions and federal entities such as the Federal Communications Commission (FCC). [1]

  8. One-way trunk - Wikipedia

    en.wikipedia.org/wiki/One-way_trunk

    In telecommunications, a one-way trunk is a trunk between two switching centers, over which traffic may be originated from one preassigned location only. The traffic may consist of two-way communications; the expression "one way" refers only to the origin of the demand for a connection. At the originating end, the one-way trunk is known as an ...

  9. Trunking gateway - Wikipedia

    en.wikipedia.org/wiki/Trunking_gateway

    A trunking gateway, also known as a PSTN gateway, is an interface between Voice over Internet Protocol (VoIP) and Public switched telephone network (PSTN). The gateway connects the VoIP line and PSTN line so that an end user can use PSTN phones to make a call over the Internet with VoIP.