Tag: initiation – DIDcomms

What is the difference between VoIP and SIP?

Posted on February 16, 2019March 8, 2019 by Daniel Kobale

The differences between VoIP and SIP. VoIP calls are sent via SIP Trunks. VoIP and SIP work in conjunction with each other! Your telecoms supplier provides the SIP trunks as this is how all your VoIP calls, fax and data are transited. You cannot make a VoIP call or send a fax to another phone line without SIP trunks. Let’s say you’re in your office; when you make a call via...
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How PSTN and ISDN switch off will impact your business

Posted on February 10, 2019February 10, 2019 by Daniel Kobale

How PSTN and ISDN switch off will impact your business. As we all know, in 2015 BT announced that they will be switching off the PSTN and ISDN networks by 2025. With this, BT will no longer accept any new orders or amendments to services applicable to any ISDN products from 2020. Once the switch-off has taken place, customers will be migrated to the IPEX (IP Exchange) core network using SIP (S...
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SIP Response Codes Session Initiation Protocol

Posted on June 16, 2018October 16, 2019 by Daniel Kobale

SIP (Session Initiation Protocol) is a signalling application layer protocol designed to create, modify, and terminate a multimedia session over the Internet Protocol. It is the most common protocol used in VoIP technology. In SIP, every network element is identified by a SIP URI (Uniform Resource Identifier) which is like an address. They are broken down as 1xx Provisional Responses, 2xx Successf...
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Move from ISDN to VoIP/SIP

Posted on November 2, 2016May 15, 2019 by Daniel Kobale

Simple steps to SIP migration from ISDN If you’re still running most of your calls over ISDN, it’s worth taking a serious look at how easy it is to switch to cheaper, more flexible SIP connectivity. Why make the switch? Until recently ISDN had been the only viable choice for most companies – from SMEs to large corporations – to ensure business-grade telephony. But the last 12 months has seen a ...
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