What is SIP Trunking / SIP Trunks?

What is a SIP Trunk / SIP Trunking

Sip Trunking is an efficient use of data connectivity to make voice calls through a SIP provider such as Tpad. Typically your existing phone system uses PRI lines (ISDN). These are separate lines to your data network that are purely used for your telephone system. These lines are installed in pairs (ISDN 2) or in groups such as an (ISDN 30). This type of line has a monthly rental and allows you the user to make or receive 1 call per line (ISDN allowing 2 concurrent calls and ISDN 30 allowing 30 concurrent calls.)

The main considerations with this type of connectivity is that you are limited to the amount of lines you have, and also the rental cost is fixed per month, even if you do not use the line, the rental remains.

Over the recent years there has been significant developments in telephony and more businesses such as yours are considering SIP Trunking for two reasons, increased capacity and flexibility, and to reduce on-going fixed costs.

Tpad is a provider of SIP services to business throughout the UK. We work with our clients to move away from expensive and restrictive aged systems to more up-to-date connectivity options and systems. SIP Trunking gives flexibility without reducing customer experience and also provides significant cost savings by reducing line and call costs.

SIP Trunking Example

If you currently have 6 lines delivered over 3 x ISDN 2 connections you are paying around £14 per month per line (£84 per month). You will also have a data connection. There are many types with different prices for data connectivity, ranging from standard ADSL at around £20 per month to private circuits at £400 a month.

Created by Tpad Ltd | UK Provider of Business Telephone Systems on 25 May 2011

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