Category:VoIP Faults: Difference between revisions

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=== Ghost calls /phantom calls / Strange CLI, nobody there===

If you receive phantom calls, perhaps from a CLI (eg ~~just~~ 4 ~~digits~~) that is odd looking, and when you answer, there's no one then these are probably from portscans of your network and not actually from the A&A VoIP servers - they won't appear on the Call Log records.

If you receive phantom calls, perhaps from a CLI (eg '1001' or 'test' or '2000001' or '0700' etc) that is odd looking, and when you answer, there's no one then these are probably from portscans of your network and not actually from the A&A VoIP servers - they won't appear on the Call Log records.

These scans result in your phone ringing with a strange caller ID, but when you answer, there's no one there because it's not a real call.

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**Allow Incoming SIP Messages from SIP Proxy Only [[VoIP_Phones_-_Grandstream_HT8xx#Ghost_calls?|Grandstream Phones have this option]]

* Also review your [[VoIP Security|Firewall]], and check you're only allowing VoIP traffic from the A&A servers.

==Audio/Sound problems==