ZyXEL LTE5121 User Guide - Page 169
VoIP, LTE-5121 User's Guide
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Chapter 17 VoIP Table 69 VoIP > SIP > SIP Service Provider (continued) LABEL Start Port End Port DESCRIPTION Enter the listening port number(s) for RTP traffic, if your VoIP service provider gave you this information. Otherwise, keep the default values. To enter one port number, enter the port number in the Start Port and End Port fields. To enter a range of ports, DTMF Mode • enter the port number at the beginning of the range in the Start Port field. • enter the port number at the end of the range in the End Port field. Control how the LTE Device handles the tones that your telephone makes when you push its buttons. You should use the same mode your VoIP service provider uses. RFC2833 - send the DTMF tones in RTP packets. PCM - send the DTMF tones in the voice data stream. This method works best when you are using a codec that does not use compression (like G.711). Codecs that use compression (like G.726) can distort the tones. Transport Type Transport Type FAX Option G711 Fax Passthrough T38 Fax Relay Outbound Proxy Enable Server Address Server Port QoS Tag SIP TOS Priority Setting RTP TOS Priority Setting Timer Setting Expiration Duration Register Re-send timer Session Expires SIP INFO - send the DTMF tones in SIP messages. Select the transport layer protocol UDP or TCP (usually UDP) used for SIP. This field controls how the LTE Device handles fax messages. Select this if the LTE Device should use G.711 to send fax messages. The peer devices must also use G.711. Select this if the LTE Device should send fax messages as UDP or TCP/IP packets through IP networks. This provides better quality, but it may have interoperability problems. The peer devices must also use T.38. Select this if your VoIP service provider has a SIP outbound server to handle voice calls. This allows the LTE Device to work with any type of NAT router and eliminates the need for STUN or a SIP ALG. Turn off any SIP ALG on a NAT router in front of the LTE Device to keep it from re-translating the IP address (since this is already handled by the outbound proxy server). Enter the IP address or domain name of the SIP outbound proxy server. Enter the SIP outbound proxy server's listening port, if your VoIP service provider gave you one. Otherwise, keep the default value. Enter the DSCP (DiffServ Code Point) number for SIP message transmissions. The LTE Device creates Class of Service (CoS) priority tags with this number to SIP traffic that it transmits. Enter the DSCP (DiffServ Code Point) number for RTP voice transmissions. The LTE Device creates Class of Service (CoS) priority tags with this number to RTP traffic that it transmits. Enter the number of seconds your SIP account is registered with the SIP register server before it is deleted. The LTE Device automatically tries to re-register your SIP account when one-half of this time has passed. (The SIP register server might have a different expiration.) Enter the number of seconds the LTE Device waits before it tries again to register the SIP account, if the first try failed or if there is no response. Enter the number of seconds the LTE Device lets a SIP session remain idle (without traffic) before it automatically disconnects the session. LTE-5121 User's Guide 169