ZyXEL P-2601HN-F1 User Guide - Page 181
The SIP Account Screen, Voice Activity Detection/Silence Suppression, Comfort Noise Generation
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Chapter 16 VoIP Table 47 VoIP > SIP > SIP Service Provider (continued) LABEL DESCRIPTION Min-SE Enter the minimum number of seconds the ZyXEL Device lets a SIP session remain idle (without traffic) before it automatically disconnects the session. When two SIP devices start a SIP session, they must agree on an expiration time for idle sessions. This field is the shortest expiration time that the ZyXEL Device accepts. Dialing Interval Selection Dialing Interval Selection Enter the number of seconds the ZyXEL Device should wait after you stop dialing numbers before it makes the phone call. The value depends on how quickly you dial phone numbers. PSTN Fail Over ("L" models only) Select this check box if you want to redirect the outgoing calls to the PSTN line (that do not use the Internet) when your SIP account is unregistered or SIP call has failed. Apply Click Apply to save your changes. Cancel Click Cancel to restore your previously saved settings. 16.3 The SIP Account Screen The ZyXEL Device uses a SIP account to make outgoing VoIP calls and check if an incoming call's destination number matches your SIP account's SIP number. In order to make or receive a VoIP call, you need to enable and configure a SIP account, and map it to a phone port. The SIP account contains information that allows your ZyXEL Device to connect to your VoIP service provider. Use this screen to maintain basic information about the SIP account. You can also enable and disable the SIP account, configure the volume, echo cancellation and VAD (Voice Activity Detection) settings for each individual phone port on the ZyXEL Device. Voice Activity Detection/Silence Suppression Voice Activity Detection (VAD) detects whether or not speech is present. This lets the ZyXEL Device reduce the bandwidth that a call uses by not transmitting "silent packets" when you are not speaking. Comfort Noise Generation When using VAD, the ZyXEL Device generates comfort noise when the other party is not speaking. The comfort noise lets you know that the line is still connected as total silence could easily be mistaken for a lost connection. P-2601HN(L)-F1 Series User's Guide 181