Hi all, I have tested chan_ss7 interconnecting two asterisk boxes. Server A and Server B The alignment work fine, CGB & CGU as well. I have done a test, generating .call files on /var/spool/asterisk/outgoing/ on server A in order to dial out towards server B. On Server B side, when calls arrive it execute a stream_file from a perl AGI script. I've tested with just 60 channels, and even when the 60 channels are not fully used, appears too much "mtp.c: MTP2 bitstream frame format error, entering octet counting mode..." and after that some of these messages, the link goes down. Up to now, I have not found where the stream is bad formed. Another test I have done is, for each .call created, I wait 1 second before create the next one, and with this way, it work fine. Can some body explain this issue ? It seems that when there are a lot of calls together at the same time, the HDLC of the Digium TE410P card can't proccess correctly the bit streams.. or I'm wrong ? Robert