SIP

Cutting Edge IP Telephony

ISDN Switch Off

As of 2025, all active ISDN and PSTN lines will be switched off, which means that IP telephony will be the next step for businesses. We can tailor a cost-effective solution that will keep you one step ahead of your competition. Upgrade today to save money and improve your communications.

NO NEW LINES REQUIRED

IP Telephony can use your existing broadband connection or can run over a dedicated voice circuit with attached service level agreements.

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EASY TRANSITION

IP Telephony can be run alongside your existing ISDN service, which creates a completely seamless experience for your customers during a transition period.

NO NEW PBX HARDWARE

We can modify your existing phone system to make use of SIP trunks. Alternatively, Invosys hosted is an entirely cloud-based IP Telephony solution, making PBX repair or upgrade costs a thing of the past.

SPARE BANDWIDTH

As IP Telephony is a direct replacement for ISDN, leaving your existing ISDN lines will create spare bandwidth.

SCALABILITY

IP Telephony can easily add or remove capacity, without having to order additional lines, making your life easier during quiet or busy periods.

COST SAVINGS

With IP Telephony you no longer need expensive and inflexible ISDN lines. Instead, information is routed via the internet which means changes to capacity aren’t as costly or time consuming. Capacity can be changed within minutes to accommodate peaks or dips in traffic, so you don't have to pay for lines you aren’t using.