Playing more with modems over SIP. I have 300/1200 working very well in to the SDF dialup line. So I decided to just set the modem to max speed and let the chips fall where they may.

It did not go well. 😆

My latency (Im on LTE) to my SIP service is
--- sip.anveo.com ping statistics ---
25 packets transmitted, 25 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 69.469/142.080/296.463/65.996 ms