SIP - or Session Initiation Protocol - is the technology that’s rapidly replacing traditional ISDN lines. Whereas ISDN relies on physical wires, SIP is a telephony service that’s IP-based, which means you can combine voice and data services in order to make your business telecoms more economically efficient.

As much as ISDN bought new quality and features to voice communications when it was first launched, SIP technology provides features to support remote working, scalability, security, reliability, and it often results in cost savings. Importantly, it allows for Voice over Internet Protocol (VoIP).

The benefits of SIP Trunking over ISDN are plentiful:


Network Consolidation: Rather than paying for both voice and data services, SIP Trunking allows businesses and organisations to use their data service for the delivery of voice services.


Significant Cost Savings: SIP services are considerably cheaper than traditional ISDN lines in terms of rental costs, and they also offer savings on landline, mobile and international call.


Predictable Costs: In most cases, there are no timed or billed calls. No hidden costs or bills to consolidate and manage. Instead of monthly shock and confusion over your voice communications statement, you will enjoy predictable monthly costs.


Disaster Recovery: If the worst happens you can minimise the impact on your business operations as calls can be diverted immediately to another site/system. Therefore, SIP Trunks can be a critical part of your business' disaster recovery plan.


Access to Unified Communications: You can unlock the benefits of an IP-based communications suite that includes mobility, instant messaging, collaboration apps, and other flexible, cloud-based tools for business productivity.



Flexible and Scaleable: SIP supports your organisation's need for fast growth across multiple geographic locations with SIP channels being added in a matter of hours, rather than weeks.