ZyXEL Communications prestige 2002 series 사용자 설명서

Prestige 2002 Series User’s Guide

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Chapter 6 VoIP Screens

Your Prestige can add IEEE 802.1Q VLAN ID tags to voice frames that it sends to the 
network. This allows the Prestige to communicate with a SIP server that is a member of the 
same VLAN group. Some ISPs use the VLAN tag to identify voice traffic and give it priority 
over other traffic.

Click VoIP in the navigation panel and then QoS to display the following screen.

Figure 23   QoS

The following table describes the labels in this screen.

Table 12   QoS

SIP TOS Priority

Type a priority for voice transmissions. The Prestige applies Type of Service 

priority tags with this priority to voice traffic that it transmits. Priorities 6 and 7 are 

reserved for network control traffic. It is recommended that you use priority 5 for 

SIP.

RTP TOS Priority

Type a priority for voice transmissions. The Prestige applies Type of Service 

priority tags with this priority to RTP traffic that it transmits. Priorities 6 and 7 are 

reserved for network control traffic. It is recommended that you use priority 5 for 

RTP.

Enable VLAN Tag

Enable VLAN tagging if the Prestige needs to be a member of a VLAN group in 

order to communicate with the SIP server. Your LAN and gateway must also be set 

up to use VLAN tags. Some switches also give priority to voice traffic based on its 

VLAN tag. 
Disable VLAN tagging if the Prestige does not need to be a member of a VLAN 

group to communicate with the SIP server.

Voice VLAN ID

Type the VLAN ID (VID) from 0 to 4095 for the Prestige to add to voice Ethernet 

frames that it sends out to the network.

Apply

Click Apply to save your changes back to the Prestige.

Reset

Click Reset to begin configuring this screen afresh.