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=8It didnt work. Thanks,Matt
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 do...
