I'm currently struggeling with a FAX connected to an ATA-187 (firmware 9.2.3) dialing to PSTN in SRST (version 9.1, CUCM is also 9.1) mode.
The problem is that the ATA is sending the dialed number digit per digit (first invite only contains the PSTN access code of 0).
I have tried with KPML enabled and disabled. Disabling KPML worked for the 8961 phones which also have no dial plan on the phone.
Usually I have only a dial peer with destination pattern 0T to the PSTN. I have tried with dial peers that match the whole dialed number without any improvement. I have even tried with a local dial plan on the ATA but it sends a TRYING when the FAX starts to dial what the SRST responds with a Forbidden message.
Has anyone successfully used the ATA-187 with SRST?
If so, how did you configure it and what software versions have you used?
Here is my SRST config for the ATA-187 which works fine for answering calls: