Session Initiation Protocol (SIP)

Session Initiation Protocol (SIP) is a communications protocol used to create, manage, and terminate sessions (calls) in an IP-based network.

This is the ‘instruction set’ that tells an application how to process a phone call: where the call is from, where the call is going, features of the call, changes that occur during the call (adding or conferencing in other participants), and disconnecting the call. SIP works in conjunction with the Session Description Protocol (SDP) to pass the audio or media associated with a call.

How is Bandwidth involved with SIP?

Bandwidth provides SIP trunking services so our customers can deliver communication services. Bandwidth owns and operates the network and provisions a variety of communication services in addition to SIP Trunking.

Bandwidth’s cloud-based communications API platform offers our customers the ability to integrate voice, messaging, 911 access, and phone numbers into their platforms. This gives businesses the ability to bring their customers closer to what matters most to them.

What are the benefits of Bandwidth’s SIP?

Industry leaders such as Google Voice rely on Bandwidth because of our stability, innovation, and growth record. Bandwidth’s reliability is exceptional. We are one of a limited number of companies trusted to provide E911 in the entire United States.

Bandwidth is able to meet these challenges because we’re a Tier 1 carrier. We own the network; billions of minutes each year run over our Nationwide CLEC. Compare that to most SIP providers, who are resellers that rely on several carriers; when you call their help desks, all they can do is open a ticket with their carriers and wait.

But when you call Bandwidth, you’re talking directly to the people who can solve your problem—although, since we control everything on our networks, we already know about your problem, and we’re working on it before you’ve picked up your phone.

But that won’t happen too often; Bandwidth is committed to providing the best service and support to our customers. Bandwidth is among the nation’s largest and fastest-growing communication technology companies. We are the SIP provider you can count on to deliver affordability, scalability, and service.

Terms related to SIP

• SIP Trunk
• Voice Over Internet Protocol (VoIP)
• SIP Phone
• PRI vs SIP