The latest technology offering flexible, cost effective connections icon

The latest technology offering flexible, cost effective connections

Analogue, ISDN2, ISDN30


Alliance has extensive experience of provisioning line rental solutions over the BT Network and will install your analogue and digital fixed lines reliably and efficiently.

We understand the market well and will manage the transfer of your existing installed lines seamlessly and without service interruption. Hassle-free line rental and outstanding call packages can be combined with our other Alliance offerings to provide a one bill service.

Significant savings on Local, National, Mobile
and International Calls

Services can be configured to your individual needs

No site visit required to transfer services across

No need to change telecoms equipment or phone numbers

A full range of traditional PSTN functions including
Call Divert, Call Minder and Call Barring

Straightforward, accurate cost management
with flexible billing

Low cost call rates and line rental charges

Excellent reliable customer service


SIP Trunk services


Business are rapidly moving towards SIP and IP telephony, especially since the withdrawal of ISDN has been announced. Voice and data convergence reduces cost and enables better functionality, bringing modern day flexibility to your business and utilising your IP infrastructure.

Working with our SIP network partner Voiceflex, we deliver calls and services when and how you want them. Automated programming within the Voiceflex network responds to changes and protects you from loss of service or outage.

Great call quality

Sound quality is improved through the engineered core network and use of the latest codecs.

Stable & Reliable

Years of core ‘up time’ is expected and delivered by careful engineering and a team dedicated to delivery.

Instant Provisioning

Need more voice channels?
Want to order 100 London numbers?
Get them instantly allocated to your SIP trunk.

To find out more about Voiceflex and their SIP network, click here

Case Study

Bristol Old Vic Theatre


For more information on our BT Lines & SIP Trunk services, please contact a member of our Sales Team
01173 700 900