Picture-perfect for multi-line phone networks, preferred from options including ISDN2 and ISDN30 to enhance your communications.

With our ISDN Line, your telephone system will get crystal clear calls every time.

Scalability and working elasticity are vital in business, but so is money. Luckily, our ISDN lines and calls deals offer an economical answer with custom-made packages, including the chance to scale up and down at any time.

SIP Trunking is the fastest-growing telephony service, and the CIC provides one of the best SIP Trunk solutions.

The CIC SIP Trunks service provides you a professionally flexible alternative to ISDN and is compatible with all the leading IP PBX brands in the UK, giving you peace of mind.

If we compare ISDN to SIP Trunks, the later ones are cheaper on a per-channel basis and more flexible in terms of what telephone numbers you can have and the sites in which you can have them.

Other benefits of the S