Will there be a positive effect from proxying?

Question

Asterisk

Colleagues, good afternoon!

We periodically have some clients have no sound.
Sometimes a VPN helps, sometimes it doesn't.

Left There is sound, Right there is no sound
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Debug

I'm not much of a specialist in this, but we are now looking for all sorts of solutions by the whole department to increase the availability of telephony.
Our servers live inside Yandex.
Belarus, Ukraine and other CIS countries constantly lose sound.

I suggested setting up HAPROXY somewhere in the cloud and connecting to it, and he, in turn, to our servers. I feel that I have one of the worst / non-working solution.

What are the options?

Our colleagues from the communications department claim that it is not so easy to transfer telephony from Yandex, so I proposed a balancer option (HAPROXY)

Where is the truth?

Answer 1

Try testing the kamailio proxy. If such proxies are scattered at points closer to the clients, they will connect to it and this will reduce the chances of audio loss on the user-server connection. From the proxy to asterisk, traffic can go as a single trunk, which in theory will also have a positive effect on the delivery of voice traffic.
PS Oops, only kamailio IAX2 doesn't seem to work. a little embarrassing

Answer 2

Before introducing a new entity into the architecture, it would be nice to understand the reason for the failure of the voice. It is difficult to do this using text dumps, especially without knowing the inclusion scheme.
It is better to take a PCAP dump and deal with it interactively.