sip-manipulation
        name                           removeAMR
        description                    remove the AMR and AMR-WB dynamic codecs
        mime-sdp-rule
                name                           sdpAMR
                msg-type                       request
                methods                        INVITE
                action                         manipulate
                comparison-type                case-sensitive
                match-value
                new-value
                sdp-media-rule
name                      mediaAMR
                        media-type                audio
                        action                    manipulate
                        comparison-type           case-sensitive
                        match-value
                        new-value
                        sdp-line-rule
                                name              isAMR
                                type              a
                                action            delete
                                comparison-type   pattern-rule
                                match-value       ^rtpmap:([0-9]
                                                  {2,3}) AMR
                                new-value
                sdp-media-rule
                        name                      mediaIsAMR
                        media-type                audio
                        action                    manipulate
                        comparison-type           boolean
                        match-value               $sdpAMR.$media
                                                  AMR.$isAMR
                        new-value
                        sdp-line-rule
                                name              delFmtpAMR
                                type              a
                                action            delete
                                comparison-type   pattern-rule
                                match-value       ^fmtp:{$sdpAMR.
                                                  $mediaAMR.
                                                  $isAMR.$1}\b
                                new-value
                        sdp-line-rule
                               name             delAMRcodec
                               type             m
                               action           find-replace-all
                                comparison-type pattern-rule
                                match-value     ^audio [0-9]+ 
                                                RTP.*( {$sdpAMR.
                                                 $mediaAMR.$isAMR.