With BT Openreach working towards phasing out traditional telephone lines by 2025 all businesses must make the switch to IP based telephony. By connecting your business phone system to the internet, SIP trunking offers you complete flexibility and has huge cost benefits as you no longer have to pay for your voice calls like you do on the traditional telephone network.
The implementation of SIP Trunks means you no longer need to get BT Openreach to physically install a new line into your premises and you can also retain and move your number should you ever move premises in the future. Better still, if your business requires a new telephone number then you can select a memorable number from any geographic location required.
SIP Trunks can be scaled up and down depending on how may lines your business needs and with inclusive calls to all UK 01,02,03, 04 & 07 numbers the cost benefits can be huge!
To understand “SIP Trunk”, you first need understand "SIP".
Over the past few years, the telecommunications industry has standardized on SIP as the protocol of choice for phone calls on the data network. SIP, which stands for “Session Initiation Protocol”, is the technology used for establishing a voice communication session on a data network (for example over the Internet). A SIP “session” might be a regular VoIP phone call between two participants or a multi-party conference call.
A SIP Trunk provides the same service you get from a traditional analogue phone line. The difference is, instead of being a physical wire, a SIP Trunk is a “virtual” phone line that uses your data network to connect your phone system back to their network.
The number of SIP Trunks is determined by a few factors. First, how many concurrent calls does your business need? As a typical rule of thumb, you'll need approximately one SIP trunk for each 2-3 users.
Secondly, your Internet connection is an important consideration. SIP Trunks consume bandwidth. Depending upon the quantity of phone calls and need for data bandwidth, you may have to expand your data circuit.
If your business experiences a line fault or power cut then all of your calls will be automatically routed to an active broadband connection. This removes the need to maintain a parallel set of lines as a back-up solution, again adding to the many cost saving benefits that SIP Trunks offer.