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.
Citel''s Portico TVA enables organizations to deliver high-value Voice over IP features and applications to digital and analog PBX telephones already working and in place over existing infrastructure. Enterprises avoid the need for expensive network asses
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