Hello all, I am having this message when receiving an incoming call from SS7. It looks like it's releasing the call straight after pickup. I am using trixbox and have setup a catch all inbound route. Debug message: Unhandled optional parameter 0x39 'Parameter Compatibility Information' [0xc0 0xd0 ]> Len = 16 [ b2 ae 0d 85 70 17 e1 f5 1f 00 0c 02 00 02 81 90 ] FSN: 46 FIB 1 BSN: 50 BIB 1 >[0] MSU*CLI> [ b2 ae 0d ]> Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 6020 DPC 6000 SLS 15 [ 70 17 e1 f5 ] CIC: 31 [ 1f 00 ] Message Type: REL [ 0c ] --VARIABLE LENGTH PARMS[1]-- Cause Indicator: Coding Standard: 0 Location: 1 Cause Class: 1 Cause Subclass: 0 Cause: Normal call clearing (16) [ 02 81 90 ] Len = 12 [ ae b3 09 85 84 17 dc f5 1f 00 10 00 ] FSN: 51 FIB 1 BSN: 46 BIB 1 <[0] MSU*CLI> [ ae b3 09 ]> Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 6000 DPC 6020 SLS 15 [ 84 17 dc f5 ] CIC: 31 [ 1f 00 ] Message Type: RLC [ 10 ] dahdi_chan.conf configuration is - signaling=ss7 ;this is ss7 signaling ss7type=itu ;using the ITU variant ss7_called_nai=dynamic ;NAI for outgoing calls ss7_calling_nai=dynamic ;NAI for incoming calls ss7_internationalprefix=003364 ;international prefix value for incoming calls ss7_nationalprefix=064 ;national prefix value for incoming calls ss7_subscriberprefix=64 ;subscriber prefix value for incoming calls ss7_unknownprefix= ;unknown prefix value for incoming calls ss7_explictacm=yes ;ACM is send as soon as call enters the dial plan...may not accepted yet though ss7_autoacm=yes linkset=1 ;arbitrary name for this set of channels pointcode=6020 ;the point code for this system...aka SPC adjpointcode=6000 ;the point code for the system that we are signaling to... aka APC defaultdpc=6000 ;the point code for the system that the CICs will be negotiated with...aka DPC networkindicator=national ;NI value for MTP3 cicbeginswith=1 ;the starting value of the CICs channel=1-15,17-31 ;the channels that are CICs sigchan=16