Ping rtt still spiking

hello, recently started using the T.omnia again and had a few questions.
with and without QOS enabled(correctly) my ping shoots up every so often even when no one is on the network but myself.

just ran a ping to google and sure enough within a few seconds my ping shot up for no reason. i had this problem before and seeked help on it, turns out it was the modem with a puma 6 chipset causing the ping spikes… now i have replaced that modem with a broadcom chipset modem and pings get nice and stable. but with T.O. my still spikes(even when no one else is using network ). my GOAL: trying to get it stable and stay around 11-15ms


WIth QOS (also tried pinging with a different computer and got same result)
Pinging google.com [172.217.4.174] with 32 bytes of data:
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=381ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=21ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=17ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=318ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=425ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=22ms TTL=54
Reply from 172.217.4.174: bytes=32 time=11ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=16ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=257ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=20ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=15ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=12ms TTL=54
Reply from 172.217.4.174: bytes=32 time=13ms TTL=54
Reply from 172.217.4.174: bytes=32 time=14ms TTL=54

Packets: Sent = 61, Received = 61, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:
Minimum = 11ms, Maximum = 425ms, Average = 35ms

Question is why does it still spike when the only thing sending/receiving any network traffic is the cmd ping?