Premises-Based IP Telephony

Today, IP Telephony is utilized in small, medium and large enterprise networks. Organizations can
choose to implement IP Telephony in one of three ways:
IP-Enabled PBX:
An IP-Enabled PBX supports an evolutionary approach to IP Telephony. An IP Telephony gateway is
installed on either the trunk or line side of the traditional TDM-PBX. An IP-Enabled PBX supports both
access and desktop convergence.

Hybrid PBX:
A hybrid PBX has the IP Telephony gateways integrated in the TDM-PBX. This reduces capital and
operating costs of the standalone gateways. The primary advantage of a hybrid PBX is the enhanced
applications such as unified messaging and contact centers.

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