Bring your PBX to the cloud — the easy way.

You can expect to pay between $15-25 per month for each line depending on the calling plan.

SIP trunks are sold in metered (pay-as-you-go) or unlimited plans. Some SIP trunk providers charge extra for account setup, support, and porting, but Nextiva includes these for free.

If you have a high call volume like a call center, you could save a lot with the unlimited plan. However, if you just need phone service connectivity with light use, then the metered SIP trunking solution is for you.

Head over to our blog for more information on SIP trunk costs.

SIP is short for Session Initiation Protocol. It’s a universal standard for managing real-time multimedia between users. It can be used for real-time audio, video conferencing, and instant messages.

Voice over Internet Protocol (VoIP) relies on SIP for reliable call routing. Business VoIP often refers to the complete phone system for expanded telecom functionality like call recording.

If you have an IP PBX, you’re ready to take advantage of the scalability of SIP trunking.

All you need to use SIP trunking is access to manage your Private Branch Exchange (PBX). From there, simply add the credentials from your SIP trunking provider to connect it to the cloud.

Some PBXs might require extra setup. Nextiva provides free assistance to get you up and running. Nextiva is compatible with almost every IP PBX system, including Avaya, Asterisk, Cisco, 3CX, FreePBX, and Mitel.

If you want additional DIDs, toll-free numbers, or call paths, let us know when we prepare your personalized quote.

You purchase call paths, so essentially, your PBX should be able to handle however many call paths you purchase. However, we do have usage limitations, please review our policy for that.

Often you only need one SIP trunk per team or location, however you will need to define the amount of sessions you need based on the amount of calls your business will receive simultaneously. For example, if you buy 20 sessions and set them up in one trunk, users under that trunk will only have the handling capability for 20 total calls in or out. Additional call attempts will hear a busy signal. Don’t worry though, we can help!

Yes, you can use any phone number with Nextiva’s SIP trunking service. The process of transferring phone numbers is known as porting. You can port landline, toll-free, cell phone, and VoIP numbers.

Nextiva offers free number porting with every account. For faster setup, we’ll provide you with temporary phone numbers until the port is complete.

Unlike Twilio's Elastic SIP trunking, there's no need to learn APIs or hire a developer to enjoy reliable IP telephony.

Primary Rate Interface (PRI) is a legacy technology that requires physical wiring from the local telephone company. It supports up to 23 concurrent calls per circuit.

SIP trunks offer greater flexibility than PRI by connecting calls over the internet using an internet connection. It handles as many concurrent calls as your PBX and bandwidth supports.

IT pros enjoy SIP trunk services because they maintain full control of their PBX and pair it with the scalability of the cloud. No on-site installation or troubleshooting obsolete hardware, either.

The bottom line is SIP trunking is the best alternative to analog phone lines. Nextiva’s reliable VoIP network connected more than 1 billion calls last year alone.

Yes, Nextiva offers simple and flexible SIP trunk pricing to meet your needs. For additional savings, you may qualify for a lower rate with an annual agreement.

Unmetered plans provide unlimited outbound and inbound calling in the United States, Canada, and Puerto Rico.

If you’re on a metered plan, you will pay the following month for usage, including inbound toll-free calls.

SIP calls work exactly the same way any phone call works. The only difference is you have to have an internet connection and you aren’t able to make more calls than you have purchased call paths.

Typically, SIP trunks use port 5060.