VoIPSwitch
A Voipswitch or softswitch is a very important device element of any telecommunications network. It connects different IP networks in order to deliver end-to-end communications
In telecommunications the automatic call-back is a computer telephone function which allows the user by the engaged addressee’s line or in the other case of the subscriber’s inaccessibility indicating the system to save the number of the called subscriber and make the call when the line will be available or when the called number is not engaged.
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