Our market leading SIP trunking solution lets you reduce your on-going call costs by replacing expensive analogue and digital lines with a data connection for your telephone calls over IP. SIP Trunking is available via broadband or a Leased Line connection.
SIP trunking is ideal if you:
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Save money Intercity’s SIP Trunking service saves you money because IP connectivity costs are inherently lower than ISDN and PSTN lines. Add to that the free ‘branch to branch’ calls nationally and internationally, lower line rental, low set up costs and the elimination of expensive call-forwarding services you can quickly see how the cost of calling drops dramatically. |
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Continuity and DR To ensure your business stays up and running in the event of an emergency we provide you with a SIP account on our secure network for your PBX and its associated phone numbers. In the event of one of your sites being inaccessible, you can use your account to redirect calls almost instantaneously to another PBX at one of your other locations. Alternatively service can be restored by moving the PBX at the disabled site to another location with an IP connection. |
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Flexibility SIP Trunking is an extremely flexible solution. You can use local numbers irrespective of the location you’re working from. What’s more you’ll also be able to move your numbers to Intercity quickly and easily with little or no disruption to your service. |
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Supports multiple locations If your business has multiple locations SIP Trunking lets you rationalise the number of ISDN lines and onsite PBXs you need to maintain, whilst giving you full control of telephone associated with each site. |
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Easily scale your telephony SIP is easy to scale and can have additional channels or DDI’s up and running within 24 hours. Using a simple communication gateway we can make SIP work with your existing telephone system and so avoiding the need for an equipment upgrade. |
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Voice & data convergence By choosing to route both call and data traffic over one of our Ethernet Leased Lines we can help you reduce costs and line management headaches even further. |
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Intercity added benefits We’re passionate about getting to know you and your business and so not only will we go the extra mile to drive down your communications costs today, we’ll keep looking for ways to do it day in, day out. We assign you a dedicated Account Manager and Customer Support agent who will conduct regular reviews to identify further cost savings and demonstrate how your business can benefit from innovations in telecommunications. |
If you’re looking for lower call costs whilst having the flexibility to work anywhere with a local presence, our SIP Trunking solution is perfect for you.
Get in touch today and one of our technical experts will give you a free, no obligation telecom audit to see how SIP can benefit your business.
We simply connect a ‘pipe’ from your business premises to our network. All you need to do is tell us where we need to connect to.

The service is also available over Ethernet to give you an all-in-one data and voice solution. It is delivered as an end to end service with guaranteed availability, voice channels and fix times.
Can I use my existing Internet connection?
This depends on your current Internet connection and how many simultaneous calls you want to make. The size of a SIP voice call is roughly 80kb, so if you have an upload of 256kb, you could have 3 simultaneous calls (without any additional data) over one connection.
Can I use SIP with my current PBX system?
Most modern telephone systems support SIP although some settings may need to be changed. If you have an older phone system we can use a special appliance called a gateway to enable your system to start using SIP. Our product specialists will be able to give you advice on compatibility and settings.
Intercity is a leading independent provider of business communications services with a 25 year track record of delighting customers across the UK and Europe.
