SIP Trunks offer increased flexibility and resilience coupled with lower cost

‘Session Initiation Protocol’ – more commonly referred to as SIP – is one of the fastest growing technologies today with many businesses choosing to migrate away from traditional ISDN lines in favour of SIP trunks.

ISDN has been the telephony technology of choice for many years due to the reliability of its service. However, cost and a lack of flexibility are prompting firms to choose alternative connectivity options and SIP is emerging as a clear favourite.

The main reasons for this are that SIP trunks allow businesses to lower costs, increase resilience, improve flexibility and use multiple new and existing phone numbers anywhere in the UK. What’s more, SIP will work with much of the voice and data networking equipment that the majority of businesses already have in place.

Deploying SIP trunks can represent a giant leap towards simplifying your organisation’s communications and preparing for the latest real-time enhancements, but the biggest motivation for most businesses is without doubt, the immediate and substantial cost savings.

By removing costly ISDN lines and routing call traffic over a data network instead, you no longer have to pay for ISDN line rental which in turn can save up to 50%* on line rental expenditure. Moreover, SIP trunks enable free calls between multiple company sites. With SIP trunking, you get a service that is more robust and cost effective than ISDN and because SIP trunking is an IP-based telephony service, you also get number flexibility which in itself delivers a host of added benefits that can solve real business issues.

*Compared to BT’s standard ISDN30 rates

Key Features of SIP

  • Save money on call costs and line rental

    Save up to 50% compared to BT’s standard ISDN30 rates

  • Free internal calls and great features

    SIP trunks enable free calls between multiple company sites

  • Scale up and down when you want

    An additional number of SIP channels can be added to a site at a fraction of the cost and time that deploying ISDN would entail

  • Built-in Business Continuity

    With a SIP trunk, incoming calls can be quickly redirected to alternative sites or numbers

  • Compatible with Microsoft® Lync 2013™

    Aspire SIP trunks are compatible with Microsoft Lync 2013™ which lets you consolidate voice, IM, audio, video, and web conferencing into a single interface and reduce your operational and administrative costs

Cost Savings

Compared to ISDN our SIP trunking service is less costly per channel and more flexible in how and where geographic telephone numbers can be used. It’s also quicker to install and provision and, as standard, it delivers extremely robust business continuity.

The service can support connections ranging from two channels for small PBX-equipped businesses to an unlimited number of channels for large enterprises and contact centres.