Hi- I've been considering writing some self-test software for several quad-E1 cards that I've just received from Digium. I don't have an E-1 channel bank, so this would be my way of checking that everything hardware-wise is working fine before I head out to the dark and cold confines of my customer's equipment room - to make everything work with their E1's. I was thinking of using crossover cables to connect E1 #1 to E1 #2, and also 3 to 4, and to write some simple test routines that would play DTMF's on one channel and look for them on the other etc. I've done this in the past with Dialogic boards and it has helped diagnose problems before I reach the field. Also, in this case it would help me make sure that the Asterisk software is set up correctly. Has anyone done something similar, and if so, could you please share your experience? Thanks Scott Stingel Scott M. Stingel Emerging Voice Technology Inc. Palo Alto, California and London, England Email: scott@evtmedia.com URL: www.evtmedia.com