[Jul 13 11:56:08] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:08] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:56:08] WARNING[23169]: app_dial.c:813 wait_for_answer: Unable to forward voice or dtmf Unhandled optional parameter 0x2e 'Unknown' [0x0 ] Unhandled optional parameter 0x39 'Unknown' [0x2e 0xc0 ] [Jul 13 11:56:20] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:20] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 Unhandled optional parameter 0x2c 'Generic Notification Indication' [0xfa ]LI> Unhandled optional parameter 0x39 'Unknown' [0x2c 0xd0 ] [Jul 13 11:56:21] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:21] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:56:21] WARNING[23169]: app_dial.c:813 wait_for_answer: Unable to forward voice or dtmf Unhandled optional parameter 0x37 'Unknown' [0xa ]CLI> Unhandled optional parameter 0x39 'Unknown' [0x37 0xc0 ] [Jul 13 11:56:29] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:29] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:56:30] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:30] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:56:56] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:56:56] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:57:09] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: !! Unable to handle message of type 0x2f [Jul 13 11:57:09] ERROR[23169]: chan_zap.c:8928 zt_ss7_error: Received error from mtp3 layer: -1 [Jul 13 11:57:11] WARNING[23169]: app_dial.c:813 wait_for_answer: Unable to forward voice or dtmf Unhandled optional parameter 0x2e 'Unknown' [0x0 ]CLI> Unhandled optional parameter 0x39 'Unknown' [0x2e 0xc0 ] Unhandled optional parameter 0x2c 'Generic Notification Indication' [0xfb ]LI> Unhandled optional parameter 0x36 'Unknown' [0x1a ] Unhandled optional parameter 0x39 'Unknown' [0x36 0xd0 0x2c 0xd0 ] Unhandled optional parameter 0x2e 'Unknown' [0x0 ]CLI> Unhandled optional parameter 0x39 'Unknown' [0x2e 0xc0 ] Can anybody help what that means? Thanks Nico