No errors but still hangs.
One of the laptops is now connected via LAN cable to RB4011 and do not see any hangs during a calls.
Another laptop is connected via WiFi and see hangs during a calls. At same time I do 'pings' and traffic monitoring from WiFi-connected laptop - traffic hangs for same time as during a call and shows 'gaps' in graphic - see attached images
As @gotsprings already written
"[it is] a wifi issue". You have not given any information about the hardware of your laptops using Microsoft Windows. However by your description and Intel's
Advanced Intel® Wireless Adapter Settings page, the issue is at hand could be related to either of the following settings:
-
Global BG scan blocking
By default, the Wi-Fi adapter will perform periodic scan for other available Access Points (AP).
Disabling this behavior can be helpful when using application software that is sensitive to brief interruptions in network connectivity. [emphasis added]
- Always: Will not perform periodic scans for other available APs.
- Never (default): Will perform periodic scans for other available APs.
- On Good RSSI: Will only perform periodic scans for other available APs when the current AP’s signal strength is low.
The default setting may causes the issues like the one you are experiencing. Either select On Good RSSI or Always - the former is the safer bet if you are using your devices at other locations too.
-
Roaming aggressiveness
This setting alters the signal strength threshold at which the WiFi adapter starts scanning for another candidate AP. The default value is Medium. Depending on the environment, one option may work better than the other. You may try other values to see which works best for your environment. However, it is recommended to revert back to the default (Medium) if no improvement is observed with other values.
- Lowest: The WiFi adapter will trigger scan a for another candidate AP when the signal strength with the current AP is very low.
- Medium-Low
- Medium (default): Recommended value.
- Medium-High
- Highest: The WiFi adapter will trigger scan a for another candidate AP when the signal strength with the current AP is still good.
You may want to make experiments with the Lowest and the Medium-Low settings.
Intel does not publish the general logic (including trigger thresholds) behind roaming decisions unlike
Apple which does this both for its mobile devices and
also for its laptops, besides the company also
discloses information about 802.11k, 802.11r, 802.11v and 802.11w support in its products. These may help you in designing in your Wi-Fi network (by selecting manually the channel, the transmit power and the location for the APs).
By the way you may want to revisit the bridge priorities you've set on your devices as only the following hex(adecimal) values are valid: 0 (decimal 0), 1000 (decimal 4096), 2000 (decimal 8192), 3000 (decimal 12288), 4000 (decimal 16384), 5000 (decimal 20480), 6000 (decimal 24576), 7000 (decimal 28672), 8000 (decimal 32768), 9000 (decimal 36864), A000 (decimal 40960), B000 (decimal 45056), C000 (decimal 49152), D000 (decimal 53248), E000 (decimal 57344) and F000 (decimal 61440) as
described in the Election process section of the documentation, also you may want to
revisit the set port costs.