Disabling the "Allow Incoming SIP Messages from SIP Proxy Only" parameter appears to resolve the registration failure issue however this might not be a suitable fix for most because the chances are, if you had this parameter enabled, you were likely a victim of those pesky SIP scanners! Thankfully all is not lost though, downgrading your devices firmware to the last stable release (v126.96.36.199) is an option until Grandstream fix the issue.
- Appreciate my support? Feel free to buy me a beer.
- Voipfone are offering you the chance to trial their VoIP service for free for 30 days. Sign up with my link.
- If you’d like to take your business communications to the next level, you can try CircleLoop completely free of charge at www.circleloop.com.