16th January 2015 by GCI

SIP Trunking and its benefits

As business and consumer demands grow, it is deemed necessary for many SMEs to look at improving and upgrading their IT infrastructure for greater flexibility, increased returns on investment and to provide a greater level of customer service throughout the business. Where many larger organisations have the equipment to aid daily operations and the facilities to communicate on a greater scale, SMEs are turning to SIP Trunking to improve their existing communications and to benefit from a variety of features that gain advantage over the competition.


What is SIP Trunking?

Developed in 1996, SIP (Session Initiation Protocol) is a real time transfer protocol that initiates connectivity between two end points in order to transfer data regardless of what the media is.

It was in 2006 when SIP Trunking became standardised by the IEFT (Internet Engineering Task Force) due to SIP becoming the most widely used protocol for VoIP implementations due to its flexibility to deliver various types of media and adapt swiftly in an ever changing industry.

Typically SIP Trunks can carry instant messages, multimedia conferences, user presence information, emergency calls and other SIP-based, real-time communication services.

How will you benefit from SIP Trunking?

Using SIP Trunks not only provides great cost savings combined with greater flexibility, but also allows businesses to do more for less by eliminating the need for separate voice and data connections. See how GCI can help your business with the vast benefits below:

Reduced costs:

It is estimated that the use of SIP Trunks can save up to 40% on ongoing telecoms costs with the provision of a voice and data connection over a single line. Not only does SIP Trunking eliminate expensive ISDN by utilising the WAN, but it also avoids multiple line rentals that would be required for running voice and data over separate connections and has the ability to provide low ‘on net’ call costs. With this in mind using SIP Trunks can give an efficient and substantial return on investment.

Scalable environment:

SIP Trunking expands the potential for communications using both voice and data together. If a business grows all the necessary infrastructure is already in place to handle any additional voice or data traffic, providing the committed bandwidth of the circuit is suitable.


As SIP Trunks are virtual rather than physical, the solution can react to customer needs by providing localised number ranges regardless of geographical location. The transition to SIP is simple and can and can usually be live within a number of days whilst bring existing numbers and number ranges with it. Furthermore, home locations and new users can also be added efficiently when required and contract commitment is usually shorter (subject to the supplier).


GCI SIP Trunks are built on top of GCIs core MPLS Network which is built in fault tolerant and fully redundant architecture owned by GCI. The UK based Data Centres manage all elements of the infrastructure to provide the highest quality of service and GCI own an ex-Nato Smartbunker to safeguard data for military grade security. With 99.9% guaranteed uptime and automatic failover, as well as being physically sound, the data centres provide maximum reliability and resilience.

Business Continuity and Disaster Recovery:

SIP Trunking is highly resilient and can aid DR (disaster recovery) with its ability for calls to be re-routed automatically to an alternative location. This could be another connection within the premises or an alternative site, however by quickly re-routing to a different IP address in the event of an emergency, service is not lost and service is maintained. These means you have a voice and Disaster Recovery solution in one.