ZyXEL p-2802h-i1 Manual Do Utilizador

 Chapter 10 Voice

P-2802H(W)(L)-I Series User’s Guide

Use this screen to maintain ToS and VLAN settings for the ZyXEL Device. To access this 
screen, click VoIP > SIP > QoS.

Figure 77   SIP > QoS

Each field is described in the following table.

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.

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.

Table 50   SIP > QoS

SIP TOS Priority 

Setting

Enter the priority for SIP voice transmissions. The ZyXEL Device creates Type of 

Service priority tags with this priority to voice traffic that it transmits.

RTP TOS Priority 

Setting

Enter the priority for RTP voice transmissions. The ZyXEL Device creates Type of 

Service priority tags with this priority to RTP traffic that it transmits.

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.