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On the hardware level, there was a paradigm shift since 1993, with emerging standards from [[IETF]], which led to several new players like [[Dialogic Corporation|Dialogic]], Brooktrout (now part of Dialogic), Natural MicroSystems (also now part of Dialogic) and [[Aculab]] offering telephony interfacing boards for various networks and elements.
Until 2011, it was the makers of telephone systems that implemented CTI technologies such as [[Telephony Application Programming Interface|TAPI]] and CSTA. But after this time, a wave of handsets become popular that were independently made. These handsets would connect to the telephone systems using standards such as [[Session Initiation Protocol|SIP]] and consumers could easily buy their telephone system from one vendor and their handsets from another. However, this situation led to poor quality CTI since the protocols (ie SIP) were not really suitable for third-party control.
So, handset vendors started to add support for CTI directly. Initially this would be over proprietary HTTP methods, but in time [[uaCSTA]] (aka TR/87) became popular and by 2016 most SIP handsets support uaCSTA control. These include: [[Snom]] (the first to pioneer it), [[Yealink]], [[Akuvox]], Panasonic and Aastra.
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