Hello list, I have about 20 Digium TE-405Ps out in the field, and I started having trouble with one just recently. The card had worked fine for a month with 4 PRIs in NFAS configuration, and then all of a sudden I started getting a disappearing D channel. A restart of asterisk / ztcfg /module unload-load did not fix the problem, but a reboot [not power off, just a restart] would bring it back online. The card would then work for another day and then poop out again, no D channel, nothing coming in from a pri intense debug. Asterisk itself was working fine, nothing strange in the verbose or debug logs. I RMA'd it back but just wondering if anyone else had this problem ? One of our customers told me over the phone that he had the same issue and that he had heard that it was an issue with the firmware on the "newer TE-4x0P cards". BTW, I did a trace on what the card was sending with a protocol analyzer... card was sending out all "1"s..... A new TE-405P seems to be working okay. Matthew Simpson TxLink Communications txlink.net + SIP and IAX origination and termination + Unlimited incoming toll-free $20/LATA + Texas origination and termination for $0.005/min + US origination and termination $0.005 to $0.012/min