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benefits of SIP, Benefits of SIP over ISDN, Blog, cloud telephony, Gamma, ISDN, ISDN switch-off, PSTN, PSTN switch-off, RDC, response data comms, Response Data Communications, SIP Cost-efficiency, SIP Disaster Recovery, SIP migration, SIP portability and flexibility, SIP Scalability, SIP trunking, SIP trunks, TalkTalk Business, telephony, the cloud, The Countdown to SIP: Are You Ready for the ISDN s

The Countdown to SIP: Are You Ready for the ISDN switch-off?

The trend to stop offering ISDN as an option started with US telecoms giant Verizon ceasing to offer ISDN services to new customers. Similarly, in Europe the upward trend was continued when in 2015 ...
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By : Maria Milenkova / 24 February, 2017 /

Blog, Cloud Communications, ISDN, Posts, SIP

What is a DDI Number?

DDI stands for Direct Dial In, it's commonly used in telecommunications networks and systems to represent a telephone number in a range of numbers.
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By : Jess Jepson / 02 April, 2016 /
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