I have FreePBX running with a collection of Cisco SPA phones (508 and 525 models) and some Sangoma S500 phones. If we dial out on our phones to a number that requires keypress navigation of some sort (for sales press 1, please enter your account number, &etc.) the Cisco phones will work fine, but the Sangoma phones won’t. Further testing revealed the Sangoma phones will transmit the first key press tone, but no further tones are transmitted.
FreePBX version: 220.127.116.11
Trunk SIP settings (we use FlowRoute as our provider): dtmfmode=rfc2833
Sangoma Phone Firmware: 1.50 (18.104.22.168)
Using SIP, not PJSIP
In the config file for the Sangoma phones, here are all the entries relating to DTMF (we are only using account 1 on the phones)
Thanks, I’ll submit a ticket and respond with the results.
Also, my initial post stripped out the XML around the config options for the Sangoma phone; it should have read like this:
I talked with Sangoma Support, and the problem was most likely that the latest firmware (22.214.171.124) was not running on the S500. I had version 1.50 of the Sangoma firmware, which included 126.96.36.199, in Firmware Slot 1 for Sangoma phones in Endpoint Configuration. However, I had to change “Force Firmware Version” from Recommended to Firmware Slot 1 in the template of the phone before the firmware was finally sent to the phone and the phone updated. After 188.8.131.52 was installed on the phone, the DTMF tones worked correctly.