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What on earth are SIP trunks?
Posted by Paul Marshall on 09/12 at 02:14 PM SIP,

The telecoms industry is fond of bandying around acronyms: VoIP, PBX, PSTN, IDSN and more recently…SIP. This is one is actually quite important as it represents the future of voice services for businesses in the UK.  
SIP, or session initiation protocol, trunks have actually been around for a while. I will try to explain what it is and what it does without getting too wrapped up in technical jargon or acronyms.
In simple terms, SIP trunking is a cost-effective, reliable and resilient way for businesses to make their calls. SIP uses a data connection to link to the public service telephone network, or the PSTN as mentioned earlier, rather than over traditional ISDN lines…also mentioned earlier. By using a data connection, costs are reduced as businesses are not using all of the PSTN to make their calls.
Quality data connections
However, the quality of the data connection is crucial and we always advise our customers to use leased lines for SIP services so they can enjoy business class voice traffic.
Leased lines do cost more than traditional broadband services but with more and more businesses already investing in leased lines for data sharing purposes and access to the Internet, it means there is no need to have both leased lines and ISDN lines.
This can mean all of these voice and data services are competing for bandwidth leading to inevitable detrimental effects on service. But by utilising the right amount of bandwidth, SIP delivers quality of voice on a line that is also being used for web browsing and file transfer.
Choice of SIP services
swcomms provides a choice of services to suit business requirements and these can be either linked directly to a SIP compatible telephone system or an existing system by using a gateway product, which means equipment does not have to be replaced.
If you did not understand SIP before, then hopefully you do now. It is a technology that BT is committed to with traditional services due to be phased out by 2025.
If you need advice, please do not hesitate to contact us. We have helped many businesses convert to SIP and enjoy the associated cost savings

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Paul Marshall's avatar
Paul Marshall on 09/12/2016

Paul has recently changed his role from presales consultant to key account manager.

Using his wealth of experience as a field-based installation and commissioning engineer, Paul is well-versed in phone systems plus data and network access services. Paul enhances customers' existing solutions with the latest applications to help them run their businesses more cost-effectively and efficiently.

Never ask Paul about his youthful travelling days... you could be there for a while. These days he is keeping it real with his two young children.