ZyXEL p-2602r-d1a Manual Do Utilizador

P-2602R/RL-DxA Series User’s Guide

Chapter 10 Voice

133

You can configure the volume, echo cancellation and VAD settings for each individual phone 
port on the ZyXEL Device. You can also select which SIP account to use for making outgoing 
calls.

With PSTN line you can make and receive regular PSTN phone calls. Use a prefix number to 
make a regular call. When the device does not have power, you can make regular calls without 
dialing a prefix number.

You can also use the PSTN Line screen to specify phone numbers that should always use the 
regular phone service (without having to dial a prefix number). Do this for emergency 
numbers (like those for contacting police, fire or emergency medical services).

Note: When the ZyXEL Device does not have power, only the phone connected to 

the PHONE 2 port can be used for making calls. Ensure you know which phone 
this is, so that in case of emergency you can make outgoing calls. 

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.

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.

Voice VLAN ID

Select this if the ZyXEL Device has to be a member of a VLAN to communicate 

with the SIP server. Ask your network administrator, if you are not sure. Enter the 

VLAN ID provided by your network administrator in the field on the right. Your LAN 

and gateway must be configured to use VLAN tags.
Otherwise, clear this field.

Apply

Click this to save your changes and to apply them to the ZyXEL Device.

Cancel

Click this to set every field in this screen to its last-saved value.

Table 40   SIP > QoS