Purpose of a Gatekeeper ?

Discussion in 'VOIP' started by Surfer, Jan 14, 2004.

  1. Surfer

    Surfer Guest

    Can anyone help me understand the reason(s) why a Gatekeeper is necessary in
    a VoIP network ?

    And how are these reasons applied to ISP Services Provviders that offer
    Prepaid VoIP calling card services, for example.

    Thanks (novice VoIP....obvisoulsy)
    Surfer, Jan 14, 2004
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  2. Surfer

    SPD Guest

    It isn't. Think of a gatekeeper as an entity where you implement
    access & dialing policy for a given set of machines speaking H.323,
    called a zone. The gatekeeper registration, admission and status
    (RAS) operations control who can register and call into/out of
    the zone.

    H.323 endpoints, like a Call Manager, can make use of a gatekeeper
    but it is not required. Also there is no gatekeeper in environments
    using other signaling protocols, like SIP.

    SPD, Mar 5, 2004
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