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COMfortel 1400 IP/2600 IP/3600 IP - Firmware V2.8 - Advanced Information - V02 06/2017
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Providers and PBXs
Providers and PBXs
In a local network (LAN), the telephone can operate as a VoIP system
telephone and/or as a standard VoIP telephone.
Provider
A VoIP provider is an Internet service provider that offers Internet telephony
(VoIP, meaning "Voice over Internet Protocol").
There are many providers that issue each customer their own phone
number, which can be called from a land line, as well as over the Internet.
Depending on the provider used, and the phone number called, these types
of telephone connections may extremely cheap, if not free of charge.
Some providers give the impression that Internet telephony is totally free of
charge. However, it is important to research the actual costs incurred by
checking the tariff tables of the particular provider. As the connection to a
land line connection is established over a gateway, the location of the
gateway may affect any charges associated with the call. This applies
especially to international calls that may be more expensive than simple
calls on a public switched network if the gateway is located domestically.
PBXs
PBXs connect different internal end devices with different public telecoms
networks, enabling users to make external and internal calls. The PBXs
make different ports/interfaces available for this.
