ZyXEL LTE5121 User Guide - Page 168
Table 69, Label, Description
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Chapter 17 VoIP Table 69 VoIP > SIP > SIP Service Provider (continued) LABEL DESCRIPTION SIP Local Port Enter the LTE Device's listening port number, if your VoIP service provider gave you one. Otherwise, keep the default value. Main SIP Server Address Enter the IP address or domain name of the SIP server provided by your VoIP service provider. You can use up to 95 printable ASCII characters. It does not matter whether the SIP server is a proxy, redirect or register server. SIP Server Port Enter the SIP server's listening port number, if your VoIP service provider gave you one. Otherwise, keep the default value. REGISTER Server Address Enter the IP address or domain name of the SIP register server, if your VoIP service provider gave you one. Otherwise, enter the same address you entered in the SIP Server Address field. You can use up to 95 printable ASCII characters. REGISTER Server Port Enter the SIP register server's listening port number, if your VoIP service provider gave you one. Otherwise, enter the same port number you entered in the SIP Server Port field. SIP Service Domain Enter the SIP service domain name. In the full SIP URI, this is the part after the @ symbol. You can use up to 127 printable ASCII Extended set characters. Bound Interface Name Bound Interface Name If you select AnyWAN, the LTE Device automatically activates the VoIP service when any WAN connection is up. RFC Support PRACK (RFC 3262) If you select MultiWAN, you also need to select the pre-configured WAN connections. The VoIP service is activated only when one of the selected WAN connections is up. RFC 3262 defines a mechanism to provide reliable transmission of SIP provisional response messages, which convey information on the processing progress of the request. This uses the option tag 100rel and the Provisional Response ACKnowledgement (PRACK) method. Select Supported or Required to have the LTE Device include a SIP Require/ Supported header field with the option tag 100rel in all INVITE requests. When the LTE Device receives a SIP response message indicating that the phone it called is ringing, the LTE Device sends a PRACK message to have both sides confirm the message is received. If you select Supported, the peer device supports the option tag 100rel to send provisional responses reliably. If you select Required, the peer device requires the option tag 100rel to send provisional responses reliably. Select Disabled to turn off this function. Session Timer (RFC 4028) Select this to have the LTE Device support RFC 4028. This makes sure that SIP sessions do not hang and the SIP line can always be available for use. VoIP IOP Flags - Select VoIP inter-operability settings. Replace dial digit '#' to '%23' in SIP messages. Remove ':5060' and 'transport=udp' from request-uri in SIP messages. Remove the 'Route' header in SIP messages. Don't send re-Invite to the remote party when there are multiple codecs answered in the Session Description Protocol (SDP). Remove the 'Authorization' header in SIP ACK messages. RTP Port Range 168 LTE-5121 User's Guide