Calls dropping at 37 Seconds

[norbi]

We have been diagnosing and troubleshooting our W52P for the past few months. Originally, we were having issues with the base reseting & constantly syncronizing. Working with our VOIP provider, we have replaced and tried various equipment.

We are currently running with a new base, upgraded internet speed (50mbp+), new router (AC1900). There are no ping issues, all pings under 100ms.

Calls seem to drop at exactly 37 seconds quite frequently. Not necessarily drop, but the phone will show we are connected but we do not hear the other party.

Base Firmware: 25.73.0.72 (Autoprovisioned by VOIP)
Handset Firmware: 26.73.017

Based on other threads, I also have these settings:
Keep alive type: Default
UDP Keep Alive Interval: 30

My AC1900 has SIP ALG disabled, as well as priority set for the W52P