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ISDN Replacement

ISDN via (S)IP

ISDN-duo will soon be obsolete! Connect your
existing ISDN exchange via (S)IP fixed without gateway
and halve your call costs!


ISDN Replacement For Legacy PBX

What is ISDN replacement?

ISDN replacement means a change form traditional ISDN circuits to SIP trunks:

  • Free calls between other offices connected via VoIP
  • We supply the ISDN to (S)IP converter, pre-configure as required and manage the whole service end to end
  • Future proof to migrate to our VoIP based phone system at a later date
  • We manage the move – ‘porting’ of your current numbers onto our network



No disruption to the configuration of the exisitng phone system!

Our ISDN converters enable a customer with a legacy PBX to take advantage of (S)IP trunking with the benefits of lower network and call costs. The network connectivity uses the customer’s own internet service. This presents a substantial cost saving opportunity as the voice bandwidth is effectively free!

The ISDN converter is a 1U rack-mount unit that connects to your legacy PBX on-site using the existing ISDN port. NO CHANGES TO YOUR PBX ARE REQUIRED. The converter is connected using IP to either your existing internet connection. All gateways are centrally monitored and managed by Infracom. Your telecoms are safe with us


SAVE UP TO 50% On your telecom costs

Working with InfraCom Communications

InfraCom has successful partner and reseller programs across Europe with a variety of benefits, incentives, helpful tools and comprehensive training. Let us help you grow your business!

InfraCom Communications

Internet- and IP-services since 2004: InfraCom UK Limited is a subsiduary of Swedish communications solutions provider, InfraCom Group. Our own IP-telephony platform includes IP-centrex, SIP connectivity, ISDN and internet. We have satisfied customers in over 20 countries. Our goal is to be the natural choice for providing smart communications services to every business.


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