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VoIP/SIP

Converting an ISDN Phone System to SIP

Any legacy PSTN services (such as ISDN) still live after the switch-off will be ceased. It is imperative to move to alternative services before this happens in order to avoid loss of service. Moving voice calls from ISDN to SIP Services is a tried and tested way of saving money on both trunk rentals and telephone call charges. ISIP ISDN to SIP Converters, allow you to start to enjoy monthly cost ...
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Using your 084 and 087 UK numbers with a VOIP phone

Did you know that even if your country or destination is not available on the 084 and 087 UK numbers free divert plan, that you can still have free forwarding to VOIP phones?!? Yes, free forwarding to VOIP phones anywhere in the world. All you need is a mobile data or WiFi connection to be able to receive incoming calls to VOIP free of charge with your DIDcomms 084 and 087 UK numbers. Order you...
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Correcting one-way audio issues with Asterisk

Troubleshooting One-way Audio in VoIP One-way audio issues are rarely the fault of your terminating call provider, they are an issue with the end-user VoIP phone, internet connection, firewall or their PBX SIP server. Fixing one-way audio issues in VoIP are best done one step at a time. Start by eliminating any double NAT possibilities by disabling NAT on any secondary routers that may be pres...
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Let’s dispel the myths around the ISDN and PSTN phase-out!

Hard selling in the telecoms industry is rampant at the moment and a lot of this appears to be being driven by BT and BT Local Business themselves. Customers have received communications from BT telling them that ISDN and traditional analogue lines are imminently going to be switched off, they even compare this to the analogue and digital (IP)TV changeover. So what is the truth behind this? Ope...
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Digitization of the UK telecoms infrastructure

The UK telecoms infrastructure is being upgraded to an ALL IP service and communication providers such as BT, Virgin Media, and others are starting the transition process. The analog service (PSTN) is expected to be switched off by 2025. Although this is correct, the fact is that BT and other fixed line providers, still have not come up with a working plan to convert home and business phone sys...
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070 numbers – End of Life

070 Personal Numbers are changing on October 1st, 2019. Are you ready for the change? From October 1st, 2019 the telecom regulations and pricing for 070 numbers will be changing, as all UK 070 numbers are being re-rated to 07 mobile rates. This means that many of our customers will either have to move to 087 numbers or just add some call credit to your customer account to cover your international...
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STUN Servers

What is STUN? A STUN (Session Traversal of User Datagram Protocol [UDP] Through Network Address Translators [NATs]) server allows NAT clients (i.e. IP Phones behind a firewall) to setup phone calls to a VoIP provider hosted outside of the local network. What does a STUN server do? The STUN server allows clients to find out their public address, the type of NAT they are behind and the Internet s...
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DOD Considering Abandoning AS-SIP

With the ratification of SIPConnect 2.0, the Department of Defense (DoD) is seriously considering adopting commercial SIP for Voice & Video over IP trunking for unclassified networks. The current Unified Capabilities Requirements (UCR) technical specification requires vendors to adopt a DoD unique version of SIP known as Assured Service SIP, or AS-SIP, which was developed in 2010 to establish ...
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VoIP to replace ISDN

After nearly 25 years of continuous service, ISDN channels are finally coming to their end of days. As more and more businesses migrate away from ISDN technologies we explore the reasons for the decline and the replacements on offer to businesses in more detail. So what is ISDN? ISDN stands for integrated services digital networks. It is a standard developed to cover a range of mediums like voi...
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