Advantages:

Ease of use. A  VoIP or EoIP solution can be integrated easily into both the data communication and telecommunication infrastructure which is connected between the PBX, the PSTN and an IP router as a standalone unit consisting of a gateway and gatekeeper. Its embedded architecture eliminates the need for any additional computers, PBX hardware or software, or reconfiguration of the PBX. The user interface to the PBX doesn't change - no prefixes or two-stage dialing is required.

VOIP Gateway provides intelligent interconnection of the enterprise PBX, IP network, and the Public Switched Telephone Network (PSTN). The MultiPath Gateway allows voice traffic to be carried over the IP network or the PSTN as appropriate to maintain a quality voice call for the user. VOIP technology switch calls from the IP network to the PSTN at any time during a call if the Tenor Gateway senses the potential for voice quality degradation, interference or other impedance.

Reliability. VOIP Gateway is a standalone unit designed for telephony reliability which has an embedded architecture designed to support VOIP applications and is not subject to the reliability issues of router and PC-based solutions. This also utilizes a unique "Pass-Through" feature to further enhance reliability. If the Gateway suffers any type of failure - even loss of power - it simply becomes a wire extension of the PBX.  This "Pass-Through" feature assures that phone service will never be interrupted.  Phone service is never jeopardized!