SIP Trunking Services

Business Phone Services

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Fully featured Colt SIP Trunking

SIP Trunking simplifies your business telephony and saves you money. Pan-European businesses who want to optimise their voice infrastructure and better manage costs should consider Colt as a provider for SIP Trunking services. With SIP Trunking solutions you simplify all your telecommunications into a single IP network.

You keep all the features of traditional telephony, and call quality, while gaining a monthly cost saving as high as 50%.

Why choose SIP Trunking services?

Reduced communication cost You may save 25%-50% savings from converged architecture combining voice and data networks. Calls between your sites are for free, even between the sites in different countries

Certified interoperability with all main IP PBX vendors Avoid testing time and lengthy configuration costs

Performance reporting Measure, control and optimise your service with enhance Network & VOIP near real time reporting

No traditional telephony features are left behind Retain traditional telephony features for business critical needs

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Colt as your trusted provider

We have 12 years of experience in SIP Trunking services, delivering to 3500 customers in 26 countries with more than 7bn minutes per year. Colt scored 4.5 out of 5.0 for SIP Trunking in Gartner’s Critical Capabilities report for Pan-European network services. According to Ovum, Colt is in the Top 3 SIP Trunking providers in Europe.

We provide highly reliable business-grade service in all our global SIP countries, offering disaster recovery, fraud management, encryption and voice security over multiple connectivity options, which allows businesses to seamlessly transition from legacy telephony to VoIP with services that include supplying full regulatory compliance (emergency call routing, lawful intercept and number porting porting) in all countries as well as a comprehensive feature set.

Continually expanding globally

In order to evolve with our international customers’ changing business needs, we continuously expand our SIP Trunking services. We now cover 27 countries globally.

Our proposition remains the same - centralised VoIP solution with a single point of contact for contracting, ordering, billing and management, for both existing Colt countries and new countries.

Below, you will find the countries currently served by our SIP footprint. If your country isn't included in this list, reach out to us here, and we can discuss specific solutions.

Our Global SIP Countries

For information related to Voice service features, Codec/transcoding/security details, IP connectivity types, resiliency & disaster recovery or additional special information, download our technical datasheet below:

Download our features & pricing sheet

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Want to learn more about our business phone services?
Check out the rest of the products below.

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With over 20 years’ experience, and the most comprehensive Pan-European network, Colt is the ISDN provider of choice for thousands of businesses across Europe.

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Disclaimer: We offer SIP Trunking services across 26 countries worldwide. Please note that if your location is not included in our list of contracting countries, we may not be able to provide you with our services. If you are based in Asia, please visit our contact us page to make an enquiry.
Which is the contracting country of your desired SIP Trunking service?*
In which country are you interested in contracting our SIP Trunking services in?
Which is the service country of your desired SIP Trunking service?*
In which country are you interested in having our SIP Trunking services delivered in?
Contract Term*
Which contract term(s) would you like a quote for?
- 1 Year
- 2 Years
- 3 Years
- Other

Which is your preferred currency? (13 Colt Countries)*
Which is your preferred currency?
Dedicated or converged?*
Dedicated or converged?
- Dedicated
- Converged

How many SIP Channels do you require?
How many SIP Channels do you require?
Which is your preferred access port type?*
Which is your preferred access port type?
- Colt Fibre
- OLO Lease Line
Which service bandwidth do you require?*
Which service bandwidth do you require?
- 1mb
- 200mb
Do you require dual access?*
Do you require dual access?
- Yes
- No
Which circuit type do you require?*
Which circuit type do you require?
- Primary
- Secondary

Name*
Name
First Last
Company Name*
Please give us the name of the company you are enquiring for
*(if you are already a Colt customer, you will be contacted by your Account Manager)
Phone Number
Please leave us your phone number to reach out to you. We aim to reply to all quote requests within 24 hours.
Email*
Please leave us your email address in case we cannot reach you via phone, so we may email the quote instead.

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