ZyXEL P-2802HW-I1 User Guide - Page 135
SIP Settings Screen
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Chapter 10 Voice Figure 74 DiffServ: Differentiated Service Field DSCP (6-bit) Unused (2-bit) 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. 10.3.3 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. 10.4 SIP Settings Screen The ZyXEL Device uses a SIP account to make outgoing VoIP calls and check if an incoming call's destination number matches your SIP account's SIP number. In order to make or receive a VoIP call, you need to enable and configure a SIP account, and map it to a phone port. The SIP account contains information that allows your ZyXEL Device to connect to your VoIP service provider. If you want to make only peer-to-peer VoIP calls, there is no VoIP service provider involved, so the SIP account information does not have to match a real VoIP service provider's SIP account. You can make up the SIP numbers. However, you should still activate a SIP account and configure its number and map it to a phone port, so that the person you call knows what SIP number you are using and the ZyXEL Device knows to which phone port it should forward an incoming VoIP call. You must use speed dial to make peer-to-peer VoIP calls. See Section 10.8 on page 142 for how to map a SIP account to a phone port. 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. P-2802H(W)(L)-I Series User's Guide 135