What Are the Benefits of SIP Over ISDN?

In the telco space, there are always conversations about how SIP (Session Initiation Protocol) Trunking can enable a feature rich communications environment. It is also known for its ability to bring direct and indirect cost savings to businesses.

On the surface, SIP does this by offering a converged voice and data network. But in order to understand the benefits of SIP, it is important to understand what technology it is replacing.

Transitioning to digital

Before SIP became mainstream, ISDN (Integrated Services Digital Network) was the main source of communications in the office. It supports digital data transmission over traditional copper networks to deliver higher quality and digitally enabled services.

ISDN improved on the classic telephone system by integrating speech and data on the same lines. It is also a digital technology, which meant it had more features and faster call set-up capabilities compared with analogue telephony.

The bandwidth of ISDN ensured it could handle different types of services such as voice, data and video. The nature of the technology also meant it was good value for organisations where multiple telephone lines are required, since an ISDN setup requires fewer lines than analogue services.

Doing more with less

Just like ISDN improved on analogue telephony, newer SIP technology added further improvements. While ISDN typically uses several line interfaces, SIP has converged voice and data traffic into a single pipe.

The benefit of the SIP approach is that voice, data and video are converged over a common network. This not only reduces network complexity but also helps to reduce costs.

Instead of planning for peak usage with ISDN, which typically requires new lines and interfaces to be installed in increments of ten, SIP can be set up based on average usage. The number of lines can be increased or decreased by simply adjusting the bandwidth used for SIP.

Multiple ISDN line interfaces and services tend to be costly, but SIP can consolidate over a single Ethernet service. SIP also tends to offer lower call rates than over ISDN.

SIP is also flexible in that is can work over copper, fibre, or even wireless access networks. In the event of major downtime, a telecommunications setup could be quickly rerouted to a disaster recovery centre, something that is practically impossible with ISDN.

Making the move

Once a telecommunications setup has moved from ISDN to SIP, feature-rich unified communications (UC) services can be laid on top of it. In addition to enabling collaboration for employees, a business could use its SIP-powered setup to connect with suppliers’ and customers’ communication systems and processes for further business productivity.

One of BTAS’ more popular services is moving companies from their costly ISDN infrastructure to cost effective SIP. BTAS can help businesses save up to 30% of their telecommunications costs by migrating them to SIP.

BTAS Snapshot provides a high-level management summary of the current status of the organisation’s communication environment and how SIP can benefit you. The on-site and remote discovery, analysis and measurement activities take on average three weeks, and are followed by a detailed report and stakeholder presentation.

Once ISDN has been replaced with SIP, BTAS Unicoms can be laid on top of the new and improved infrastructure. Various communication end-points, such as desk phones, conferencing, mobile devices and PCs, can be brought together into one seamless user experience, allowing an organisation to have easier, faster connection with customers, partners and suppliers.

Contact us to find out more about how the switch to SIP can help your business today.