Business SIP Services

Our SIP service allows you to replace traditional fixed PSTN/ISDN lines.

Cost effective and reliable virtual lines

SIP trunking is the fastest-growing telephony service.  Cablestream provides one of the UK’s leading SIP trunk solutions. It connects your site PBX via an IP connection to carry and terminate your inbound and outbound voice calls across the public telephone network.

SIP Trunks provide a highly flexible alternative to ISDN, they are cheaper on a per-channel basis and more flexible in terms of what telephone numbers you can have and the locations in which you can have them. In addition, they are quicker to install and offer a robust business continuity service that ensures your business never loses any calls.

Our service can support connections ranging from two channels for businesses with small PBXs, with no limit on the number of channels that can be supported for large enterprises and contact centres.

The benefits of SIP trunking:

Flexibility with phone numbers

SIP trunking enables you to move office and keep the same geographic number without any ongoing call-forwarding costs or those associated with producing new company stationery.

Business continuity

If your office has to be temporarily relocated in an emergency, this can be achieved quickly and cost-effectively with SIP trunking to keep your business working.

Line rationalisation

For businesses with multiple sites, SIP trunking provides the opportunity for line rationalisation and reduces the number of PBX's you need to maintain – while retaining full control of the numbers associated with your business.

Save money

IP connectivity costs less than ISDN with lower call costs, free internal calls between extensions and offices and lower line rental costs for multi-sites. Also, no expensive call-forwarding costs are required should you relocate or need to divert calls in the event of a disaster.


SIP trunking provides a phone service that will cope with any situation and give you business-grade resilience for your telephony. Whether you need to keep your business running in a disaster or emergency or you need to load balance your calls between sites during peak hours, SIP trunking delivers.

Call us now to see how SIP trunks can help your business 0345 241 3680.


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