ZyXEL MAX-306 User Guide - Page 159
Technical Reference, 12.4.1 SIP Call Progression, Table 59
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Chapter 12 The Service Configuration Screens Table 59 VOICE > Service Configuration > QoS LABEL DESCRIPTION Voice VLAN ID Select this if the WiMAX 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. Apply Reset Otherwise, clear this field. Click to save your changes. Click to restore your previously saved settings. 12.4 Technical Reference The following section contains additional technical information about the WiMAX Device features described in this chapter. 12.4.1 SIP Call Progression The following figure displays the basic steps in the setup and tear down of a SIP call. A calls B. Table 60 SIP Call Progression A 1. INVITE 4. ACK 6. BYE 5.Dialogue (voice traffic) B 2. Ringing 3. OK 7. OK 1 A sends a SIP INVITE request to B. This message is an invitation for B to participate in a SIP telephone call. 2 B sends a response indicating that the telephone is ringing. 3 B sends an OK response after the call is answered. 4 A then sends an ACK message to acknowledge that B has answered the call. 5 Now A and B exchange voice media (talk). User's Guide 159