Voice Services

SIP Trunks

SIP trunks present a flexible and more cost-effective alternative to ISDN lines for both inbound and outbound calls. As a replacement for ISDN, SIP trunks work by connecting your PBX (Private Branch Exchange) to the PSTN (Public Switched Telephone Network) using broadband.

When compared to ISDN, SIP trunking is less expensive per line and is quicker and easier to install. Carden Telecoms are a professional SIP trunk provider in the UK. We have supplied SIP trunks to local businesses here in Sussex, but also to organisations across the UK. Any business currently using a PBX can easily switch to a SIP trunk service.

Customers often as us how many calls can a SIP trunk can handle. The number of calls is actually determined by the number of SIP channels. Each channel allows for one incoming or outgoing call at a time. Small businesses can normally function on two SIP channels whereas larger businesses with numerous offices or call centres would require multiple lines.

As a SIP trunk provider, Carden Telecoms can install your SIP trunk, connect it to your PBX, and if required we can manage it on an ongoing basis as part of a comprehensive business telecoms package. If you do not currently have a PBX, we can provide one for you, either on premises or hosted in the cloud.

Unsure whether SIP trunks would be a cost-effective solution for your business? Speak to us today to find out.

The Benefits of SIP Trunks

1. Cost

Customers using SIP trunks not only get more reliable connections than with ISDN, they can also save as much as 50% on line rental and up to 25% on call costs.

2. Disaster Recovery

SIP trunks handle emergencies with ease, allowing you to reroute calls in the event of unforeseen circumstances.

3. Highly Scalable

Perfect for growing companies or those with a seasonal business. Scale your line up during busy period and reduce costs during quieter periods.

4. Free Internal Calls

Ideally suited for organisations with two or more sites, there is no charge for calling between business premises.

5. Skype Compatible

Connect your Skype for Business account to allow it to make external calls over SIP.

Frequently Asked Questions

How does a SIP trunk work?

SIP trunks connect your organisation’s PBX (either on-premises or hosted) to the wider phone network. You can then make calls to landlines and mobiles directly from your existing VoIP system. The number of simultaneous calls you can make is determined by the number of channels your SIP trunk has.

How many calls can a SIP trunk handle?

Only one SIP trunk is required, as the number of calls is determined not by the number of SIP trunks, but by how many channels the SIP trunk has. Each call (either outgoing or incoming) uses up one channel. How many channels your SIP trunk needs will depend on how many concurrent calls you expect to be making at any one time.

How much does a SIP trunk cost?

The cost of SIP trunking for a company would include an upfront SIP trunk installation fee, a monthly rental fee (dependant on the number of trunks and channels) and then call charges, which will vary depending on the VoIP platform you are using.

Save money on your lines

Call Carden Telecoms today for more information

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