Is there a tool available to check the quality of SIP trunk provided by the end supplier
I suspect my service provider decrease/ changes the bandwidth allotted for the SIP trunk as we notice voice quality issue occurring randomly.
Is there a way to monitor the Quality of service or measure the bandwidth provided for the SIP trunk.
There are many to measure the bandwidth (google it) . For your other issue, I would tcpdump sip and rtp and analyse using Wireshark to see if there is any packet loss or jitter. There are some other tools/standards available to test the audio quality. Search for PESQ and POLQA
You could set up homer or voipmonitor.
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