we got 3 offices, lets say Site A where the CM is located), site B & site C.
this faulty phone is in Site A, when used within site A, it's working well.
However when calling Site B & C, there's no sound/audio. testing shows that its codec is also g.729 as a normal call between each site. also only this phone have this problem! so I would say it's not the firmware (correct me if i'm wrong). also done a factory reset, but still the same.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
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CUCM Database Replication is an area in which Cisco customers and
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