09-23-2021 12:48 PM
We have SPA508G phones, and would like to change the ringer volume by adding a SIP header with Alert-Info. Is this possible?
We tried:
Alert-Info: volume=8
It didnt work.
Thanks,
Matt
Solved! Go to Solution.
09-25-2021 02:37 PM
FreePBX uses Sangoma phones. Remote volume control, the Sangoma's proprietary extension of SIP protocol doesn't work on other phones.
09-24-2021 03:17 PM
Alert-Info is standard RFC3261 header. It handles just ring tone, not the volume. Per-call volume change is not possible as far as I know.
09-25-2021 08:25 AM
Thanks Dan, I thought that was the case, but then I noticed FreePBX (Asterisk) has a Ringer Volume Override option, which adds the SIP header with Alert-info and volume. It might be for certain phones (probably Digium) though. Too bad Cisco phones dont have that capability since we are getting a lot of requests for that from the field.
09-25-2021 02:37 PM
FreePBX uses Sangoma phones. Remote volume control, the Sangoma's proprietary extension of SIP protocol doesn't work on other phones.
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