Business SIP Trunking

SIP Trunking

What is SIP Trunking?
A SIP trunk is a service offered by a supplier such as Supanet that permits businesses that have a Telephone PBX to use Voice-over-IP (VoIP), outside the enterprise network by using the Internet connection. The SIP Trunk enables connection to the standard PSTN and Mobile telephone networks via Supanet or our partner Tpad, thus eliminating the need for expensive multiple ISDN lines and also benefiting from lower cost calls. A business would keep their existing phone system but look to gain benefit from a SIP Trunk, especially if they were making a large amount of phone calls on a month by month basis and/or their call spend was high.

SIP trunks can offer additional significant cost-savings for enterprises, eliminating the need for local PSTN gateways, costly ISDN BRIs (Basic Rate Interfaces) or PRIs (Primary Rate Interfaces).

Free Supanet Offer
Supanet in partnership with Tpad are able to offer customers FREE SIP Trunking with some of our connectivity solutions. Thus if you are currently paying for a large number of lines e.g. using ISDN 30 you can switch to supanet and make great savings. Please ask our staff for details of this amazing offer.

Elements of SIP Trunk
There are three components necessary to successfully deploy SIP trunks: a PBX with a SIP-enabled trunk side, an enterprise edge device understanding SIP and an Internet telephony or SIP trunking service provider (such as Supanet with its partner Tpad).

In most cases the PBX is an IP-based PBX, communicating with all endpoints over IP, but it may just as well be a traditional digital or analog PBX. The sole requirement is that an interface for SIP trunking connectivity is available.

The enterprise border element
The PBX on the LAN connects to the Service Provider via the enterprise border element. The enterprise edge component can either be a firewall with complete support for SIP or an edge device connected to the firewall, handling the traversal of the SIP traffic.

The Service Provider
On the Internet, Service Provider provides connectivity to the PSTN (Public Switched Telephone Network) for communication with mobile and fixed phones.

Call Handling via SIP Trunk
Once you get this service, your private telephone system (called PBX) will no longer be directly linked to the public telephone system (called PSTN). Instead, your PBX will be connected to a SIP softswitch which is also connected to the internet.

When you make a phone call, this softswitch will determine whether your call is for a PSTN number or another SIP enabled telephone system. After that, the softswitch will then route your call to wherever it is directed. The advantage here is that your phone call will not travel through the typical telephone lines used by the public telephone system – thus you will not need them and can save money.

A SIP Trunk can actually handle more than just one phone call at a given time. Because it uses the internet, it can handle as many phone calls as the bandwidth capacity allows. So if your company conducts a lot of phone calls every day, then getting a SIP trunk will surely lessen your bills.

Also, SIP trunking removes the complicated abundance of hardware and wirings just to support the flow of calls, because the only thing needed is to use the servers of the chosen Service Provider.

Features and benefits

  • Cost Reduction – costs can be dramatically reduced through the reduction of the number of lines required; and calls are free when they are made across the SIP Trunking links.
  • Business Continuity – in the event that you can’t access your telephone, automatic failover means that calls are automatically re-routed to an alternative location.
  • Not Geographically tied – you can retain your existing number range and add other area code numbers as required.
  • Flexibility – SIP Trunking can be quickly scaled up or down on a per line basis so you can easily meet peaks and troughs in demand.
  • Central Management – you will no longer need a separate line to each of your locations using this virtualised technology, which means network infrastructure management will be simpler.

Supanet’s SIP Trunking Solution

Most of our customers obtain two main benefits when using SIP Trunks.

1.The lines (channels) are virtual and can expand / contract as your business requirements demand. Your inbound numbers can be directed to a SIP Trunk away from an ISDN 2/ISDN 30 connection for which you are paying for each line irrelevant if the line is in use or not. Our SIP channel carries no recurring charge, only the cost of the call being routed over it. As long as you stay with Supanet there is no charge for these channels (lines).

2. Low cost IP call rates, due to the ability of our Group to negotiate the best rate card possible for your business we can deliver significant savings when compared to standard business rates from the more traditional providers.

Supanet currently has a special offer with FREE SIP Trunking with selected Connectivity Solutions. Call our staff for details.

Supanet & Tpad – Working Together

Supanet works with ( when designing a communications platform for our clients. The linkages between the capabilities of a clients data infrastructure and being able to utilise this for Voice use is also where Tpad, as a specialist in this area, really make the difference for the benefit of your business.

Traditionally there has been a split between an organisations data and voice infrastructure. ISDN lines have been used for voice and separate data circuits (ADSL to Private Circuits) have been used solely for data use. These walls are now being broken down and more and more business are moving to what is called a ‘converged’ or ‘shared’ infrastructure

The benefits of this being reduced price (1 network instead of 2) and moving to an IP based voice platform that both saves money on calls and delivers increased functionality like video, call recording and remote user inclusion.

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