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Carrier SIP Trunking

Carrier SIP Trunking

Call Us 08009540764

For customers equipped with a SIP-based private branch exchange.

Great For

  • Low Cost Calls

    Low Cost Calls

  • Flexibility


  • Easy to Set-up

    Easy to Set-up

  • Business Grade SLA

    Business Grade SLA


  • Low cost SIP channels, typically cheaper than ISDN

  • End to end support

  • Flexibility, your customer can add channels in seconds

  • Business continuity, with a dedicated network and failover by public internet

  • Selecting numbers, both new and porting

  • Spend management tools

  • Future-proof, IP based alternative to ISDN

  • Immediate set-up

What is Carrier SIP Trunking?

For your customers equipped with a SIP-based private branch exchange this is a market leading, highly cost effective solution. Delivering telephone services and unified communications it offers low-cost SIP channels and the best priced voice rates alongside competitive connectivity.

With a huge number of features, your customers can take advantage of spend alerts, contract flexibility and the reassurance of failover, offering total reliability. We deliver SIP Trunking via our dedicated network-to-network interconnect (NNI) made up of two, 1Gbps fibres. It allows a minimum of 100 simultaneous calls and up to 5,000 calls per pair. It’s all managed by our NGVS provisioning team and supported by our 24/7 fault team.

The Details


6 hour fix for data, so your customers stay connected when they need it.

Our UK based fault team is available 24/7. Calls are answered and don’t go to voicemail. Once our team acknowledge a fault during the call, the SLA clock starts right away. 


Carrier SIP Trunking is delivered via dedicated network-to-network interconnect (NNI) typically comprising 2 x 1Gbps fibres, with the option for traffic to failover via the public internet. 


The minimum contract term is 30 days. As flexibility is at the heart of SIP Trunking, you can scale contracts up or down on a monthly basis. 


Only for Carrier Partners with a hosted aggregation PBX environment. The service does not support Emergency calling (999 and 112). 

You must make arrangements with your end customer for emergency calls support.

You're responsible for obtaining and allocating new numbers and number porting.