SIP : Overview

Session Initiation Protocol (SIP) Trunk is an advanced Voice Connectivity product, with the best in class IP solution. SIP trunking, sometimes also referred as VoIP trunking or IP trunking, uses the Internet pipe to carry voice rather than a typical connection over traditional PSTN connections. SIP Trunks is a necessary platform for running unified communication applications. There are many benefits of implementing SIP trunking. It can save enterprise money, including lower long distance calling plans, low cost International call rates and lower inbound toll free solutions along with easy expandability.

SIP Trunk Advantages


Easy and quick scalabllity

Simplifies network

Smaller upgrades & downgrades

Scalable on a single link with 20 to 1500 simultaneous calls with no dependency on physical cards

Replaces traditional multiple fixed PSTN lines with a single links SIP trunk connectivity

Increase & dicrease call capacity in multiples of 10, rather than 30 in PRI


SIP Trunk Features






Service Delivery

Class 5 NGN Switches

On request channel upgrade / downgrade

Direct Inward Dialling (DID) facility

Default DID

Equal to number of channels

Direct Outward Dialling (DOD) facility

Minimum number of channels


Tele marketing number


Multiple last mile options : Copper, RF and Optical Fiber

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