sbc_100rel.pdf

在fs中配置：

  • enable-100rel 设置为true
➜  fs-conf ack 100rel
sip_profiles/internal.xml
112:        There are known issues (asserts and segfaults) when 100rel is enabled.
113:        It is not recommended to enable 100rel at this time.
115:    <!--<param name="enable-100rel" value="true"/>-->

sip_profiles/external-ipv6.xml
36:    <!--<param name="enable-100rel" value="true"/>-->

sip_profiles/internal-ipv6.xml
27:    <!--<param name="enable-100rel" value="false"/>-->

sip_profiles/external.xml
36:    <!--<param name="enable-100rel" value="true"/>-->

enable-100rel

This enable support for 100rel (100% reliability - PRACK message as defined inRFC3262) This fixes a problem with SIP where provisional messages like “180 Ringing” are not ACK’d and therefore could be dropped over a poor connection without retransmission. 2009-07-08: Enabling this may cause FreeSWITCH to crash, seeFSCORE-392.

参考