ZyXEL P-2602HW Guida Utente

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 Chapter 11 Voice
P-2602H(W)(L)-DxA User’s Guide
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Figure 89   DiffServ: Differentiated Service Field
The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior), that each 
packet gets across the DiffServ network.  Based on the marking rule, different kinds of traffic 
can be marked for different priorities of forwarding. Resources can then be allocated 
according to the DSCP values and the configured policies.
11.3.3  VLAN Tagging
Virtual Local Area Network (VLAN) allows a physical network to be partitioned into multiple 
logical networks. Only stations within the same group can communicate with each other. 
Your ZyXEL Device can add IEEE 802.1Q VLAN ID tags to voice frames that it sends to the 
network. This allows the ZyXEL Device 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.
11.4  SIP Settings Screen 
Use this screen to maintain basic information about each SIP account. You can also enable and 
disable each SIP account. To access this screen, click VoIP > SIP > SIP Settings.
Figure 90   SIP > SIP Settings
DSCP
(6-bit)
Unused
(2-bit)