ZyXEL VMG9823 User Guide - Page 220
VoIP > SIP > SIP Service Provider > Add New Provider/Edit continued
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Chapter 21 Voice Table 98 VoIP > SIP > SIP Service Provider > Add New Provider/Edit (continued) LABEL DTMF Mode DESCRIPTION Control how the VMG 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.729 and G.726) can distort the tones. SIP INFO - send the DTMF tones in SIP messages. Transport Type Transport Type Select the transport layer protocol UDP or TCP (usually UDP) used for SIP. Ignore Direct IP Select Enable to have the connected CPE devices accept SIP requests only from the SIP proxy/register server specified above. SIP requests sent from other IP addresses will be ignored. FAX Option This field controls how the VMG handles fax messages. G711 Fax Passthrough Select this if the VMG should use G.711 to send fax messages. You have to also select which operating codec (G.711Mulaw or G.711Alaw) to use for encoding/decoding FAX data. The peer devices must use the same settings. T38 Fax Relay Select this if the VMG should send fax messages as UDP or TCP/IP packets through IP networks. This provides better quality, but it may have inter-operability problems. The peer devices must also use T.38. QoS Tag SIP DSCP Mark Enter the DSCP (DiffServ Code Point) number for SIP message transmissions. The VMG Setting creates Class of Service (CoS) priority tags with this number to SIP traffic that it transmits. RTP DSCP Mark Enter the DSCP (DiffServ Code Point) number for RTP voice transmissions. The VMG creates Setting Class of Service (CoS) priority tags with this number to RTP traffic that it transmits. Timer Setting Expiration Duration Enter the number of seconds your SIP account is registered with the SIP register server before it is deleted. The VMG automatically tries to re-register your SIP account when onehalf of this time has passed. (The SIP register server might have a different expiration.) Register Resend timer Enter the number of seconds the VMG waits before it tries again to register the SIP account, if the first try failed or if there is no response. Session Expires Enter the number of seconds the VMG lets a SIP session remain idle (without traffic) before it automatically disconnects the session. Min-SE Enter the minimum number of seconds the VMG lets a SIP session remain idle (without traffic) before it automatically disconnects the session. When two SIP devices start a SIP session, they must agree on an expiration time for idle sessions. This field is the shortest expiration time that the VMG accepts. Phone Key Config Enter the key combinations for certain functions of the SIP phone. Call Return Enter the key combinations that you can enter to place a call to the last number that called you. Caller ID Display Call Enter the key combinations that you can enter to activate caller ID for the next call. Caller ID Hidden Call Enter the key combinations that you can enter to deactivate caller ID for the next call. One Shot Caller Enter the key combinations that you can enter to activate caller ID for the next call only. ID Display Call One Shot Caller Enter the key combinations that you can enter to deactivate caller ID for the next call only. ID Hidden Call VMG9823-B10A User's Guide 220