Tones dialed with our Yealink VP59 Zoom Phone Appliances (Keypad or App) are not regularly being recognized by IVR Systems. They are running Yealink VP59 18.104.22.168 with Zoom app 5.8.0 (293) and showing up-to-date on the Zoom Device List.
It is when dialing out into other people's systems. We can hear the tone(s) associated with the keys that we press, but it is as if the tone is not sent or heard by the other systems. It doesn't seem to make a difference if we are responding to the menu prompts with the VP59's hardphone keys, or the VP59's Zoom App display keys, nor with the speakerphone or handset.
Yes, the problem is only with our Yealink VP59 Zoom Phones running in Zoom Appliance mode. We also acquired a Yealink SIP-T58A and two Yealink SIP-T54Ws, and they tones are recognized as expected with them.
Yes, I can access the local config on the VP59s via browser.