Call cuts off/voice breaking issue

[rshahriar]

Hi 3CX Experts,

We are having call cuts off/braking voice issue in particular two extensions in our phone system. When sysmptomps started we had changed the ISP modem, our voice and data networks are differenet and we updated 3cx phone system (on-premesis hosted in Intel Nuc computer) from windows10 to Debian 3CX version and changed those two phone sets along with cables and everything (except the network cable that is behind the wall going to the patch panel). We updated switch and check all settings.
But still no luck, still having the call cuts off /voice breaking issue in intermittent way with most of the phone calls. But no issue found with internal extension to extension calls. Only outbound calls and bridge calls having these cuts off issue.
If anyone had these types of bad experince and have overcome the issue can your share your troubleshooting steps?
Thanks in advance.

 

[leejor]

The voice issues, being limited to two sets and outside trunk calls, may be a Codec issue. Look at the 3CX Activity log to see which Codec is being used, and if it remains that same all the way through (no transcoding).

Also make use of the Activity Log to see which end is dropping the calls.

You might try moving the sets, temporarily, to another location, to see if the issues follow, eliminating in-wall wiring