Joseph, Thanks for the reply. Answers below. On Wednesday 23 April 2008 20:57:12 Joseph wrote: > Could you post the settings you used with libss7? switchtype=dms100 signalling = ss7 ss7type = itu ;ss7_called_nai=national ;ss7_calling_nai=national linkset = 1 context=ss7-test group=1 pridialplan=national networkindicator=national pointcode = 1 adjpointcode = 14768 defaultdpc = 14768 cicbeginswith = 1 to channel=1-15 cicbeginswith = 17 channel = 17-31 sigchan = 16 > Also do you know what speed the A/F link is that you are connecting to? If I understand your question, they are 64Kbps. Thanks, Barry