Draytek Vigor2920n User's Guide download pdf (Page 251)

Vigor2920 Series User’s Guide

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This page allows you to set phone book and digit map for the VoIP function. Click the Phone

Book and Digit Map links on the page to access into next pages for dialplan settings.

Enable Secure Phone It allows users to have encrypted RTP stream with the peer side

using the same protocol (ZRTP+SRTP). Check this box to have

secure call.

Enable SAS Voice Prompt If it is enabled, SAS prompt will be heard for both ends every

time. If it is disabled, no SAS prompt will be heard any more.

Enable SAS Voice Prompt, for ex: if vigor router A calls vigor router B with checking Enable

Secure Phone and Enable SAS Voice Prompt, then:

1. After the connection established, vigor router A will send SAS voice prompt to A and

vigor router B will send the SAS voice prompt to B.

2. Then the RTP traffic is secured until the call ends.

3. If vigor router A wants to call vigor router B again next time, both A and B will not hear

any voice prompt again even checking Enable SAS Voice Prompt on web UI. It means

only the first call between them will have voice prompt.

Enable SAS Voice Prompt, for ex: if vigor router A calls vigor router B with checking Enable

Secure Phone but not Enable SAS Voice Prompt, then:

3. After the connection established, vigor router A will NOT send SAS voice prompt to

vigor router A and vigor router B will NOT send the SAS voice prompt to vigor router B.

4. Even no voice prompt, but the RTP traffic is still secured until the call ends.

Note: If the incoming or outgoing calls do not match any entry on the phonebook, the

router will try to make the call "being protected". But, if the call ends up "unprotected"(e.g.

peer side does not support ZRTP+SRTP), the router will not play out a warning message.

In this section, you can set your VoIP contacts in the “phonebook”. It can help you to make

calls quickly and easily by using “speed-dial” Phone Number. There are total 60 index entries

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Draytek Vigor2920n User's Guide Page 251