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A telephone extension is an internal telephone line attached to a Private branch exchange (PBX). The PBX operates much as a community switchboard does for a geographic telephone numbering plan and allows multiple lines inside the office to connect without each phone requiring a separate outside line. In these systems, a dialer usually has to dial a number to tell the PBX to connect with a landline to dial an external number. Within the PBX, the user merely dials the extension number of the person. Each phone line may be extended up to a fixed maximum.
Secure Call
A Secure Call is a voice connection which can't be wiretapped and it runs over Voice Over IP (VoIP) communication protocol.
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is the PBX committed to perform Secure Calls both end to end and end to site. It differs from a standard PBX for exposing just the Secure Call service to VoIP Brand brand server
clients and can be connected to a standard PBX via SIP Trunks if configured accordingly.Brand brand client
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is the VoIP client for Secure Calls connections. It has to be used along with Brand brand client
and is deployed in two different models to perform two different security models: Brand brand server
Professional: used for end to end communicationsBrand brand client
Enterprise: used for end to site communicationsBrand brand client
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Conference Rooms
The Conference Room is the kind of call that more persons can partecipate. The conference calls are usually defined as "rooms", whose access can be limited by time settings or pass code.
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