Additions: - Extended the digit of "Line ID" from 24 to 63. - Added the specification that the # key is treated as a regular dialed digit when dialed as or after the second digit. [POUND_KEY_DELIMITER_ENABLE] (Y(default) : # is treated as the end of dialing delimiter) (N : # is treated as a regular dialed digit) - Added DTMF relay by using SIP-INFO method. - DSCP value could be set separately for RTP and RTCP. - Expanded the size of Refere-To header from 255 bytes to 511 bytes. - Supported for some carriers to use the conference server of another domain. Corrections: - Improved the problem that the call transfer using REFER may be failed.
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