Configuring Release Cause Mapping

When a call is disconnected, the reason for the disconnection (or call failure) is sent by the side (IP or Tel) on which the call disconnection occurred. From the IP side, a SIP response is sent (e.g., 406); from the Tel side, an ISDN cause code is sent (e.g., 6). You can configure ISDN-SIP release cause mapping rules, as discussed in this section.