[asterisk-users] Detect Low Quality Calls - Realtime

[XBrian]

Hi there,
I support a large number of enterprise users who contractually must connect to 
our support center via a 4G VOIP connection.

I simply want to be able to auto detect all poor quality calls in realtme (as 
they are being made), play a message and drop the call - without user 
intervention. All decent call quality calls will be allowed through - to be 
handled by support staff.

Its a challenging and tricky one as I cannot install any software on the callers 
endpoint. I can only detect calls as they hit our server, do the magic and based 
on latency, bandwidth and MOS (Meaning Opinion Score)  - decide whether the call 
should be let through. I will accept all MOS values of 4.0

Any bright ideas?