So, this number worked on your previous Axxess system, on the same PRI?
Looked at your L2L3 traces. Both SETUP messages are identical. There's nothing on the Mitel side to make this call fail.
Something in ISDN signaling must be different between Mitel and Axxess systems to make that happen...
I think of 3 things. This is just ideas...
- Might be a Numbering Plan / Type of Number problem. Never worked with Axxess systems, but Mitel 5000 default config send "National Call" TON for 1-800 calls, and not "Unknown" as Mitel 3300 does.
- Try to send only 10 digits for CPN Substitution (your caller id). I worked on similar problems with an old GTD5 switch that rejected some calls in some conditions with 11 digits CPN.
- Are you able to dial this number on your cell phone / POTS line? 1-800 numbers are available for defined areas. Maybe this changed for this number.
What do you think?