BT announces the end of ISDN

BT Group CEO Gavin Patterson has set a date of 2025 to switch off the Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) networks.

It might seem a long way off – but with millions of subscribers to migrate and little further investment in the existing ISDN likely to take place, switching to more sophisticated SIP technology should be a priority for businesses. Session Initiated Protocol (SIP) is a data communications protocol ‘standard’ designed to support the features required to set-up, handle and clear-down Voice over Internet Protocol (VoIP) telephone calls on Local and Wide Area TCP/IP data networks.

While it sounds like a job for the telecoms department, an industry survey* in 2016, revealed that 52% of IT managers also have responsibility for telecoms. The same survey revealed that 67% of IT managers don’t know what SIP is, despite its status as the next big shift in telecoms.

SIP trunking is a very cost-effective, powerful, scalable and highly flexible solution that helps businesses to streamline their communication costs and resources. Its key features are the removal of physical phone lines – replacing them with ‘virtual line channels’ in an Internet connection, and reducing the restrictions around call capacity and location. The fact that it uses ‘virtual’ phone lines rather than physical wire pairs, means SIP is highly scalable and  – depending on the number of ‘lines’ used – we’ve seen monthly call and service charges typically 40% to 80% cheaper than traditional ISDN lines. It also makes it easier to increase, and decrease the number of ‘lines’ for your business needs, with very short lead times (< 24 Hrs) – and very low connection fees!

But it’s not just the cost savings that make SIP such an attractive proposition – it also offers a level of flexibility that traditional ISDN simply can’t compete with. As workforces continue to gravitate towards flexible working, the demand for remote office and mobile solutions are only going to increase in the coming years. SIP enables employees who are working remotely to have internal and external calls made to their desk-phone automatically delivered to their smartphone or PC, without incurring any forwarding charges. The same is true if a line is busy, or if an office is hit with an unforeseen event – e.g. a local network failure, severe weather or fire damage. SIP trunking minimises these problems, allowing a business to adopt a very flexible Disaster Recovery strategy, and keep working through most eventualities.

And let’s not underestimate the importance of that. The industry survey* also found that for 63% of respondents, it would take less than two hours of being unable to make or receive calls before a business suffered reputation or financial damage.

Of course, not everyone likes change – and ISDN has undoubtedly been a robust and reliable technology. However, bear in mind that during this phase-out of ISDN, BT’s investment in the technology will also diminish – making it less reliable over time.

So – with the switch to SIP inevitable, what should organisations consider before making the move? As with most things in life, it’s all about selecting the right partner. Businesses should do their research and try to find a provider that has its network, data centre and connectivity all under one roof. It’s only when something goes wrong and customers realise they have account management with one company, connectivity with another and a data centre on the other side of the country that things become a real headache. Before committing to a contract, they should make sure they know where every aspect of the solution is being housed – and try to pick one that has an end-to-end service.

There are six steps to switching to SIP:

  • Ensuring you have capacity [bandwidth] in your Internet connection
  • Setting up the phones and call routes
  • Putting a Disaster Recovery plan/strategy in place
  • Planning system migration & porting existing numbers
  • Testing the set-up and call routing
  • and securing the system from external attack.

Of course, we at Foxhall Solutions can assist with this process and introduce our Internet and Carrier partners to provide a reliable and easily supported telephone system solution. Contact Us now to talk about how we can reduce your costs and increase your capabilities to work with your customers, suppliers and staff.

*Sourced from Neil Armstrong, director of business services, Timico

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