ZyXEL P-2612HNU-F3 User Guide - Page 244
SIP Identities
View all ZyXEL P-2612HNU-F3 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 244 highlights
Chapter 16 VoIP Table 64 VoIP > FXO (continued) LABEL Force to SIP if PSTN unplugged DESCRIPTION Select this check box to have the ZyXEL Device redirect outgoing calls to the registered SIP account if the ZyXEL Device is not connected to the PSTN network. Apply Cancel When you try to make a PSTN call, but the PSTN port on the ZyXEL Device is unplugged, the ZyXEL Device uses the phone port's registered SIP account to make the call. Click Apply to save your changes. Click Cancel to restore your previously saved settings. 16.10 Technical Reference This section contains background material relevant to the VoIP screens. 16.10.1 VoIP VoIP is the sending of voice signals over Internet Protocol. This allows you to make phone calls and send faxes over the Internet at a fraction of the cost of using the traditional circuit-switched telephone network. You can also use servers to run telephone service applications like PBX services and voice mail. Internet Telephony Service Provider (ITSP) companies provide VoIP service. Circuit-switched telephone networks require 64 kilobits per second (Kbps) in each direction to handle a telephone call. VoIP can use advanced voice coding techniques with compression to reduce the required bandwidth. 16.10.2 SIP The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol that handles the setting up, altering and tearing down of voice and multimedia sessions over the Internet. SIP signaling is separate from the media for which it handles sessions. The media that is exchanged during the session can use a different path from that of the signaling. SIP handles telephone calls and can interface with traditional circuitswitched telephone networks. SIP Identities A SIP account uses an identity (sometimes referred to as a SIP address). A complete SIP identity is called a SIP URI (Uniform Resource Identifier). A SIP account's URI identifies the SIP account in a way similar to the way an e-mail 244 P-2612HNU(L)-FxF User's Guide