I recently upgraded my FiOS Internet at home (residential FiOS) to the new FiOS Quantum gigabit speed. I immediately could not use most of my VoIP phones even though the phones and IP were registered with the PBX. Worked fine before but not after. I started to notice a pattern. Only my phones configured for pjsip wouldn’t work and my older sip phones would work. I went through and converted all my pjsip phones to sip and they started working! No matter what I did on the phones I could not get them to work with pjsip so I suspect that the quantum router is blocking the pjsip ports and not the sip ports. I may be wrong but I believe pjsip is a newer more robust protocol and some point in time sip would be deprecated?
After considerable research I believe that there are 2 versions of the quantum router. The default one they give you (black) is the one that has this issue. I have read that people who have upgraded to the newer round white quantum router (extra one time charge $475) do not have this issue. I plan to upgrade my router to the newer round white router and will update this thread when its installed and tested…
It should also be noted, my company is a Verizon re-seller and we offer a fiber based product through Verizon (for businesses only) where they install the same ONT (converts the fiber to Ethernet) and we install our own router which does NOT have this problem. Same fiber, different router and absolutely no issues.
This issue has caused me a lot of grief and explained why a lot of my customers were having issues taking their phones home to work virtual. I hope this helps someone out there who runs into the same problem but doesn’t know why.