Using a UCM63xx : I have 2 analog trunks using a ZTE line.
My issue is the system cannot detect incoming key presses.
It works for internal calls, it does not work on any cell phone or land line incoming calls.
I have gone through all settings, diagnostics, and forum pages that I’ve found.
PSTN has been auto-detected. Signalling troubleshooting couldn’t detect incoming pulses at all from the keypress.
DTMF on the extensions are set to RCF4733.
I am sure I am missing something here, but if anyone can help that would be great.