Minimum Version Required:
The above information is based on the majority of Asterisk systems.
Asterisk is a software telephone system that is commonly run on Linux platforms. A range of different SIP handsets and devices can be used with it.
There are many different versions of Asterisk. Some releases do not offer any support for CTI, some only offer partial functionality. Please contact support with you specific release and version of Asterisk, for more clarification.