SIP Trunks - How it works

SIP or Session Initiation Protocol is a standard communication protocol for voice and video across a data network. SIP replaces the traditional POTS line a.k.a land line which gives you the ability to make only 2 calls (with call-waiting). It is also a cost-effective alternative to PRI lines which gives you the ability to make 23 simultaneous phone calls. But just like dial-up is no longer the ideal method for connecting to the internet, SIP is now the preferred alternative to PRIs and POTS lines for phone services.

To take advantage of SIP trunking, an organization must have a PBX (phone system) that connects the internal phones, an Internet Telephony Service Provider (ITSP) and a gateway(router) that serves as the interface between the PBX and the ITSP. 247VoIP Services is not only an ITSP that provides business-class SIP trunks to organizations, we also recommend, install and manage internal PBX systems for customers.

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On-Premise PBX Required

If you have more than 50 phones and do not want to take advantage of our Cloud Phone System then the first thing you need is a PBX system that all the internal phones will connect to. If you don’t have one, don’t worry, 247VoIP services can help with that. You have an option of picking from various vendors such as Cisco, Avaya, Mitel and others for your new phone system and we will install and configure it for you. Traditionally, this PBX system would then connect to a PRI line from the phone company to allow you make 23 simultaneous phone calls. However, PRI lines are additional costs and also considered an older technology. This is where SIP comes in, and this is where 247VoIP Services can help.

Leverage Existing Internet Connection

Leverage your existing internet connection to connect to our SIP servers as a cost-efficient alternative to traditional PRI voice services. Since SIP runs over IP to connect your PBX to a Public Switched Telephone Network (PSTN), you get to save money on PRI/T1 installation and connection costs that the phone company would have charged you. Your PBX connects to our SIP servers and our SIP servers connect to the PSTN to route your calls to the outside world.

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Free On-Net Calls Between Locations

Save money on local and long distance calls by using SIP for calls between office locations or to others on our network. Because SIP uses IP, calls between your IP network locations never have to go out to the PSTN, thus saving you a significant amount of money.

Built-in Redundancy

If your IP network is not redundant, our systems will automatically route calls to an alternative number or to a voicemail so that callers do not hear a busy signal during an outage of your internet. We can also offer POTS lines as a backup solution for non-redundant IP networks.

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Cheaper Than Traditional Mediums

With 247VoIP SIP Trunks you will immediately start saving money on your phone bills. You could save up to 50% on your phone services. Show us your current phone bill and we guarantee you cost savings. You can also start with exactly the number of voice channels you need (call paths/simultaneous calls) and increase as needed.

No User Training Required

If you already have a phone system with PRI or POTS line, switching over to SIP does not change anything for the end users. The same phones, extensions, voice-mail service and other features will still be used. Absolutely nothing changes for the end users. SIP works in the background leveraging your internet connection to make and receive external phone calls instead of PRIs or POTS lines.

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Add or Upgrade Services Easily

No more waiting 30 days for a PRI line from the phone companies. Furthermore, with PRI if you want to make 30 calls you need to get another PRI because each PRI can only allow 23 phone calls. However, with 247VoIP SIP Trunks, you can start service today or add extra call paths (voice channels) in minutes when needed.

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Sign up today and start using our business-class SIP trunking services in less than 24 hours.

Plans & Pricing

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