I'm not sure but may be You must not use "avpkt 4000" ?!! but something that is more resonable for TELNET sessinos ?!? don't know what is reasonble ...!! AFIAK and from the discussions on the list this is very important for the right calculations...so the reason may be is wrong calculations, not sure thought..:") Tell me if this help. ===== iVAN raptor@unacs.bg =====