Other troubleshooting steps:
Swap the SLI card with another one. Does the problem follow the card or remain at the station? Does the problem go away as if by voodoo?
Are all amphenol cables tightly connected, with the little strap to hold them in place? (yes, I have found that to be a cause of GSW (general system weirdness) in Elites - see also "bad installation practices").
Program up an identical station on the same card. Same problem?
Examine the COS, if assigned, and review any relevant options. Try creating and assigning a new COS, with only those options that you specifically need on the fax machines.
Program a mailbox in voicemail to notify one of the numbers that does not work from the fax. Call the mailbox, leave a message, and watch in CoSessions for the outdial string when the notification is sent. Does the call go through? Is the string correct?
