> > Siemens EWSD > > > /etc/asterisk/ss7.conf > > [link-l1] > enabled => yes > linkset => ss7trunk > channels => 2-31 > schannel => 1 don't you use common schannel '16'? (but that's ok, over here is commonly used 16 as signalling channel). anyway, I still get NOT_ALIGNED messages: # ss7 link status linkset wiltel, link l1, schannel 16, sls 0, NOT_ALIGNED, rx: 20, tx: 0/4, sentseq/lastack: 127/127, total 114448, 114544 wiplex at lab# [Jul 14 12:01:41] WARNING[7054]: mtp.c:513 t2_timeout: MTP2 timer T2 timeout (failed to receive 'O', 'N', or 'E' after sending 'O'), initial alignment failed on link 'l1'. thank you. caio