What is SIP Trunking?

SIP Trunking uses Session Initiation Protocol (SIP), a signaling communications protocol commonly used for Voice over IP (VoIP), to deliver voice calls through the Internet.  Businesses use SIP Trunking to replace existing telephone lines that connect internal phone systems with the Public Switched Telephone Network (PSTN). Rather than using a dedicated circuit for your phone calls, SIP Trunking uses the Internet to carry both voice and data signals and allows for as many voice calls as bandwidth allows.

 

Considerations for Deploying SIP Trunking

Organizations look at the following criteria as they assess a transition to SIP trunking

Number of Phones

The total number of phones you have throughout the enterprise will likely determine the configuration and capacity you require.

Number of SIP Trunks

How many simultaneous calls do you need to handle at your peak call traffic? Think of SIP trunks like concurrent call paths; regardless of how many telephone numbers or Direct Inward Dial numbers (DID’s) you have, your number of SIP trunks will determine how many simultaneous calls you can make at any given time.

Phone System

SIP Trunk Routers can be configured to support many legacy phone systems, as well as newer IP-PBXs.

Optimal Trunk Capacity

If you are using your main internet connection for your SIP trunks, you will want to ensure that your internet bandwidth is large enough to support both your normal daily online usage as well as your call volume.

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