63 thoughts on “Is Verizon blocking VoIP on FiOS?”

  1. Vonage has been working without any trouble at my house for the last two years with Verizon FIOS

  2. I’ve had FIOS working with another VOIP provider just fine since day one. I also use the actiontec router mentioned. So it doesn’t seem to be a general problem.

  3. I just got Fios 2 weeks ago with the Actiontec MI424WR and I can confirm similar VoIP problems. I connect to my corporate voice pbx and since the switch we have had little or no service when running through the Actiontec. Interestingly, when we change the configuration to act as a bridge to our linksys router, everything runs fine.

    In troubleshooting the Actiontec, we encountered several SIP errors in the log. We chose not troubleshoot it since we didn’t want to deal with an unresponsive tech support. I’d love to be in touch with your verizon contacts and sort this out.

  4. My voip works fine with the actiontec router, however, other machines of mine do not work well with my actiontec because it’s a crappy router. I don’t think it handles DHCP timeouts very well – you’re much better off manually assigning ip addresses. You should of course assign ip addresses manually if you’re going to use the firewall.

  5. My Vonage voip on the high-speed FIOS option works better than any cell phone connection I’ve ever had, crisp & clear. Very close to copper based analogue. Six months, no problems. Superb service on minor adjustments. NJ. I do have a Vonage complaint: paying for unlimited dialing to the EU, but can NEVER get through.

  6. Works great for me … I only have FiOS Data 20Down/5Up and no phone service from verizon.

    Router is Actiontec MI-424WR.
    LinkSys PAP-2 NA

    Using Voipdiscount for outgoing calls
    Using GalaxyVoice for incoming calls

    (Stanaphone and Messagenet (Italian provider) both working great)

    Working great for almost a year.
    What was reported here is very likely a user generated problem.

  7. … To Eric Mandel, setting up two routers in cascade is not the easiest of tasks, and most home routers are not even built to do that efficiently this is why everything works when you have it in switched mode.

    As a possible solution, you might be running behind a double NAT in your configuration. You should disable NAT in one of the routers and enable RIP on both. This should get your setup to work. By the way, there is nothing wrong with the bridged configuration that you are using.

  8. … to Ed Huang, I agree that the DHCP is bad in the actiontec. I really do not know why they did not fix that yet. The problem is very simple, if a DHCP lease time expires since a coputer does not log in for long time, the next time the same MAC address tries to get an address the DHCP will not work.

    It is possible that this might be a workaround for some of the other pieces a.k.a. STB which might not work correctly. a.k.a. having the wrong MAC address during boot-strap. (Only guessing here)

  9. Another Net Neutrality Red Herring. Listen people. There is no conspiracy against you other than to get the most money out of your pocket. Taking a technology away from people is not the way to do that. As long as there is competition, companies cannot do whatever they want, or they will lose customers. I can’t wait to get FIOS, but if they want to block VOIP, then I’ll stick with cable. Or DSL. Or Satellite. Or WiFi. Or dial-up. There are plenty of companies out there who want my money and who can provide the service I want.

  10. I have used Vonage, Skype and GizmoProject with FiOS for two years. I have also tried BroadVoice without any issues. I have a D-Link Router as this was the router Verizon was using two years ago. If Verizon blocked VoIP I would DROP THEM!

  11. I’ve had FIOS here in Northern Virginia for a little over a year and we’ve had no issues using Vonage with it. My parents also have FIOS and Vonage, going on 2+ years now…

  12. It is a known issue with one router and one gizmo used by Sunrocket. I’m encountering it, but it isn’t an intentional problem, as it doesn’t mess any other combinations up.

  13. I had Sunrocket on Comcast and switched to Verizon FIOS about a month ago. There is a very easy fix. The Actiontec router Verizon installed did not have the latest firmware. Simply download the latest firmware (easy to do) then get into the Protocols section, click on your provider, in my case Sunrocket, get out of settings, restart the Actiontec by unplugging and replugging in the power and it should work fine. My service has been outstanding.

  14. yea! i have allways had problems first they gave me a di604 d-link router. and when i got packet 8 voip, if the computer was on i would allways get a buisy signal. so i changed the ip address of my voip router by one decimal and it fixed it. but now verizon gave me a new actiontec router and my phone dosen’t work again. does anybody have any suggestions? because i cant get my voip routers ip without a phone connection. help

  15. When I looked at the firewall setting of my verizon fios router, I happened to see that under “advanced filtering” there is a new rule that drops all UDP packets with port 5060 and 5061. The rule is marked as “Sunroket voip phone service”. I remember I never created this rule. I realized that verizon upgraded the firmware automatically recently. This rule was added by verizon in this upgrade. If you have verizon fios service, you’d better check it out. This rule blocks your voip traffic and may be the reason of your service trouble. I should say that I don’t have any problem using my sunrocket’s service with this rule being active. But I removed it anyway. You can make your own judgement why verizon did this.

  16. FIOS does not block vonage, but a defect in the service causes interruptions in calls. FIOS only grants an IP address through DHCP on a two-hour lease! Meaning that, every two hours, you lose connectivity for 15-30 seconds. (I’m using a Cisco router, not the Verizon one). Guess what happens to VoIP calls when that happens? I’m switching to a service that leases me an IP address for at least a day, like Verizon’s DSL used to do.

  17. I have had FIOS internet with Sunrocket for 18 months with no problem, On Monday I had FIOS TV installed with the Actiontec router, and now Voip does not work. At one point something crashed the actiontec router, so i reinstalled the old router DLink and everything is fine, except no VOD.
    Thanks to everyone for the fix suggestions.

  18. I know of several FIOS offices and home using VoIP, nothing is beling blocked, but often FIOS uploads choke hard rendering the service uuusable for VoIP.
    HOWEVER, what is very disturbing is I know of two verizon DSL installs where the SIP from and to tages have been stripped out. I tried a replacement router with no improvement. This I think is Verizon blocking….

  19. I had to switch right away. So I had no choice but to switch to Teleblen. The service works fine with Comcast cable but it doesn’t work with FiOS. I cleared all prev rules on the router. I even added the IP address of gizmo to DMZ zone but nothing. Then I tried creating a new rule so that all the ports for gizmo IP address are open. I get dial tone but i can’t dial out. When someone calls, I can see the number in caller ID but when I pickup, there’s nothing. I tested calling in so on the other end, it is continuous ring. If someone gota solution please post here or send me an email at “rx7240sx300zx at hotmail dot com”

  20. I have used Vonage over FiOS for a year with no problems. Someone stated that FiOS only leases IP addresses for two hours. My “external” IP address has not changed for a year. I manually set the “internal” IP address of my Vonage terminal, so that never changes, either. I am in SE Pennsylvania, in the Philly suburbs.

  21. I confess that I am technologically challenged. I live in the Philly suburbs and have Vonage as well as Fios. No problem with Vonage until Actiontec M1424WR rounter was installed. Now my Linksys RT31P2 (Vonage) router drops the phone line every 3-4 days. I reset the Linksys router each time, but it keeps happening. I do know how to access both routers. Can someone please give me (in non-technical talk) some clue as to what might be the problem and how I can correct it myself? I truly would appreciate it!

  22. I have Verizon VoiceWing VoIP on FIOS with an Actiontec router for over a year now. I have had clicking on the phone since day one. I have two lines. One of the lines stopped receiving calls and reports an error when ever anyone calls it. I can call out on that line. Line 2 works fine so I logged on to my Verizon Personal Account Manager and forwarded all calls to line 1 to line 2. I called Verizon tech support but have not been able to get a response from them for 2 days. I have been on hold for close to one hour this time. When I try to login to my Verizon Personal Account Manager it keeps timing out before I can do anything.
    Gateway Timeout
    The proxy server did not receive a timely response from the upstream server.
    Reference #1.420f648.1187051125.eeebf71
    I think I will try some other VoIP service.

  23. My voip service works fine with Comcast cable and it worked with fios for 3-4 days but it doesn’t work with FiOS. I get dial tone but i can’t dial out. When someone calls, I can see the number in caller ID but when I pickup, there’s nothing. I tested calling in so on the other end, it is continuous ring. If someone gota solution please post here or send me an email at viralms23@hotmail.com

  24. Apparently Mitel phones DO NOT WORK with FIOS and the Actiontec router. Looks like I may be dumping FIOS for Comcast. See transcript between me and Actiontec:


    You wrote:
    Hello, Verizon gave me one of your routers with my FIOS service. My
    computers work but I can’t get my Mitel IP phone to work. The phone works
    ok through SBC DSL and Comcast (using the routers they provide), but I
    can’t get it to work through FIOS/Actiontec. Tech support for my IP phone
    tells me there must be a port blocked, so I tried moving the phone to the
    ‘DMZ’ and it still doesn’t work. It starts to communicate with our PBX at
    work (it can download its internal firmware), but it can’t establish any
    call handshaking. Are there some bugs in your DMZ implementation? Does it
    really allow packets between the phone and the internet without any
    filtering? Does the router require a hard reboot to make DMZ take affect?
    Will DMZ work with an IP address that was assigned dynamically? (The phone
    displays the address it gets and it matches what I set up as the DMZ.)
    I’ve called Verizon support and they said they don’t block any ports
    (except incoming port 80, which the phone doesn’t use), so if there’s a
    problem it must be with your box. They even logged into my computer
    remotely and verified I had correctly configured the Mitel phone to be in
    the DMZ. My router FW is Thanks, Jay

    The reponse to this issue is below:

    At this time the Mitel voip phones will not work with the actiontec router
    due to the proprietary connectivity the mitel uses for communication.. This
    will be addressed in the next firmware release from verizon. Please

    continue to check with verizon regarding firmware upgrades.

    Thank you,

    Actiontec Electronics

  25. Sounds like they don’t support STUN somewhere in the mix.

    Try using a VPN connection with your Mitel set and see if that works.

  26. Hello Tom. You said you are using a Cisco router for your FIOS. I am having the toughest time trying to get my Cisco 815 router to work with my Verizon FIOS Internet connection. Do you have any sample config that I can model after to get my to work? Also, can I ask what Model Cisco router you are using? please help.

  27. Just thought I would let you know that even if you setup a dmz the actiontec router still blocks traffic across certain ports.
    A possible workaround is to setup up port forwarding. But as you all know this is hit and miss. Most of you have tried this anyway.

  28. I have had Verizon FIOS for about 6 months now and my Vonage Router (Linksys) drops almost on a daily basis. If anyone knows of any settings I can change to make it stop, I’d love to hear it. My Linksys router is about 3 years old, but never dropped once before I got the ActionTec FIOS router.

  29. I am using Verizon FIOS with Vonage. I had no problems with Fios internet until I had them install Fios TV. Now my Vonage RT31P2 router drops once per week and has to be reset. I had to place the Vonage RT31P2 behind the Verizon Actiontec MI424WR router. Anyone have an idea what is happening?

  30. I was very happy with Verizon DSL Service, but made the mistake of going to FIOS. I think we all need to understand that the fiber line is Verizon’s net work and the copper is a public open net work, so when you switch to Verizon fiber they got you! Everyone also must understand that when they come to hook up your fiber line they remove the copper line!!!! To double get you! So now I can not go back to my DSL service and now I have no more copper line. I told them I wanted my copper line back up on the pole and they refused!! I think removing the copper is illegal as it was attached to my house, and I am sure someone paid to have that line installed originally.

    Now on to VOIP. You bet Verizon is blocking this service! Did anyone think that Verizon was going to spend Billions of dollars building a fiber optic network and allow some company to jump on board with out at least paying for the service? When I talked to customer service they told me straight up they are blocking AT&T and Vontage, but did not know about my VOIP issue with T-mobile. So there you go, and really when you think about it is their private network and they can do as they please. I am wondering if the FCC has even written any laws regulating Fiber networks so they can probably do as they please. So now I am stuck and probably need to go to my cable company Comcast to continue my VOIP service.

    In closing, technically speaking Verizon is not block the VOIP service the modem is, which is manufactured by Actiontec for Verizon designed by Verizon. So when they say they are not blocking it this is true, but Actiontec is under direction of oh yes you guessed Verizon.

    All the best,


  31. I have switched to Comcast and everything is working great! I have cancelled FIOS! It feels so good after all the time I wasted talking with them.


  32. To one of Michael’s points, VZ owns the copper up to the NID on the outside of your house. Beyond the NID to the inside wiring is your copper. They are not removing the copper on the poles.

    I have FIOS and couldn’t wait to get rid of the copper – the fiber service is much better than DSL.

  33. I would advise any person to avoid doing business with Verizon as far as one can. I know this is not possible where they do not allow “naked” DSL or you have no other service choice.

    If you let them in your home, entertainment life or wireless service, you have invited evil. They are a monopolistic, innovation stifling, lawyer run, lawsuit happy bunch of pigs that are the biggest curse on communications and technology that ever existed in the US.

    Stay away from them. There are many alternatives.

  34. Coax, Actiontec MI424WR and ATT TA (Dlink The DVG-1120) doesn’t work for me. However I still have an original Dlink DI-624 that came with my first FiOS installation year ago. I have never had any problem with CAT5, DI-624 and ATT TA combo – ever!

    Coax and Actiontec MI424WR came everything shot to hell. I had to call FiOS back (from my cell phone) got on my knee and begging them to come back and get rid of the coax and rewire the CAT5.

    I tossed the Actiontec MI424WR into the trash and put the Dlink DI-624 back on and ATT TA behind it, everything works like a dream.

  35. I had no problems with FIOS until my router burned out earlier this year. Verizon came out very promptly and replaced it. Very nice techs too. The new firmware was pretty, but I couldn’t successfully forward ports except POP3 and SMTP. Verizon said they only block port 80 (http) I had been forwarding 81 to 80 for HTTP, but it quit working. Today I loaded an older firmware I found for the actiontec and it has not got the Verizon brand, now port forwarding is working again! I was running, now I am running I have seen that there is a newer release out there, but it is from Verizon, so I don’t trust it to forward my ports. If anyone needs the older firmware, i found it here –> http://www.satelliteguys.us/verizon-fios/83041-actiontec-firmware.html

  36. We have been having issues with one of our remote teleworkers that just had Verizon FIOS installed at their house. OUr Mitel Teleworker phone will not work with that Actiontech router MI424-WR. ANyone had any luck with this. I have seen several issues like this with the Mitel phones but I also ready that there is suppose to be a firmware update form the Actiontech, but I cannot find it. Any help would be appreciated.

  37. Same problem here as Andy with Mitel/MI424-WR.

    Amazing… I was having this problem back in August and Verizon/Actiontec STILL has not fixed it (even with latest firmware). As others have reported, even putting the phone on the ‘DMZ’ doesn’t help (some DMZ). Looks like I’ll have to switch to Comcast to get my VOIP phone working.

  38. I had Vonage working fine over Comcast for 3.5 years but, for the last few months, I often (at least once during every call) experienced situations where I could hear fine but the person on the other end couldn’t hear me for 10-20 seconds at a time.

    All my Comcast line levels looked OK. Vonage even sent me a new device but it made no difference. I switched to FiOS and it seems that everything is fine now.

  39. Mitel phones now work with Fios. the latest formware version fixed the problem for me, i believe it came out on 12/27/07.

  40. With latest firmware upgrade now my Mitel teleworker phone also works.. But it seems I have now lost connectivity for my Juniper Networks VPN client! ActionTec bites…. I want my Linksys back.

  41. I have had alot of connection problems using the Actiontec router,no one else in my home does but me,we each have 4 laptops 3 are sony vaio’s including mine and a desktop,at first I thought it was my network card,spent hours on the phone with sony,I tried the connection at my job and stayed on without any problems,I decided to sign on with my ip on verizon and changed the firewall settings to the lowest and so far have been on for 7 hours without any problems,hopefully thats the end of the dipping in the connection! I do think it is a dhcp server problem,everytime I got that yellow triangle and red x I noticed the dhcp server value disappeared,another strange thing is in my network folder where it lists my network connection all of a sudden it shows unspecified for my comp but as long as I stay connected it dont matter!

  42. Upgraded today to firmware version

    Mitel 5212 phone is now registering to the switch in Teleworker mode.

    To upgrade to the newest firmware on the MI424WR:

    1. Login to the router using a web browser pointed to the routers internal IP address… 192.168.x.x
    2. go to advanced, click yes.
    3. click on firmware upgrade, click check now. Your browser will really not show you much here…
    4. Click on force upgrade, then wait. Your router will do the rest.

    It will take about 5 minutes to upgrade. The router will reboot. Try to log into the router again. If the main page does not pull up, just wait longer. Once you can login to the router again, go check the firmware version on the advanced page. Mine is version after to upgrade.

    I hope this has fixed my Cisco 7940 phone. It was dropping calls at exactly 15:10 minutes. Very strange.


  43. I have the Linksys RT31P2 Vonage router behind an ActionTec MI424-WR and I have been losing the phone connection regularly. I can’t say how often because I only notice it when I happen to look at the router and notice that the light next to Phone 1 is out. The Internet light is fine. I pick up the phone and there’s no dial tone. Unplugging the Linksys and replugging it in fixes it for a while but I have no way of knowing how many calls I’ve missed. I don’t know if Verizon is blocking it or if it’s just some setting that I need to figure out.

  44. You need to shut down your whole system, PC, both routers and any other PC’s or devices accessing the wireless router. Leave them off for about five mins. so the IP addresses are released. Restart them in this order: 1) ActionTec 2) Vonage 3) PC and then 4) any other devices. Do not restart the PC until the Vonage router has synced up. This will allow the assignment of the 1st IP address to the Vonage router. This should clear up your issue.

  45. Thanks Chris. In order to better understand the issue do you know if the Vonage router needs a specific IP address or just the first? I’d rather not shut everything down since there are other ways to make sure the Vonage router gets a specific IP address. Also, do you know why it matters what IP address the Vonage router gets? Thanks!

  46. My vonage worked flawlessly on fios until this morning. Callers to my number heard a busy signal in spite of my voice mail and bounce line. Spent four hours with the vonage tech and still couldn’t resolve the issue. The engineers will check compatibility issues next. Too bad it will take up to two business days. Today is Friday that means it may take til Tuesday to resolve this problem. If fios is the problem I will switch back to cablevision. Vonnage was very compatible with Optimum on line.

  47. Verizon FIOS in Bellevue WA is doing to VoIP what Comcast did/does to BitTorrent. I configured my asterisk server for outbound registration with Jeff Pulver’s FWD service, and i was seeing SIP [600 Interval Too Brief] responses. After a lot of troubleshooting, it turns out that the SIP 600 responses are not from FWD. I moved the asterisk server to a Comcast Internet connection, and outbound FWD registration works fine.

    Importantly, Verizon does not block all outbound SIP, only to certain providers (eg. FWD). I was able to register with another SIP provider using the Verizon FIOS account. I guess this is in line with their “plausible deniability” strategy. Shame on Verizon!

  48. Sridhar,
    I will ask around here about your issue, but it seems like there would be another problem. I’ve heard of no such blocking here at Verizon, and besides Jeff himself would have called it to my attention. Jeff Pulver is a happy FiOS internet customer; I know because I asked him just this month in person about his service. If he were having any FWD issues, I’m sure he’d have mentioned it. In fact, I will also ask him if he’s heard of such isses. Let’s get to the bottom of your problem. You can find me on Twitter @CZ.

  49. All with FIOS problems,

    I have had FIOS for going on two years and have had Vonage just as long. Please keep in mind that 99 percent of all the problems I have seen reported in this message thread can be directly contributed to the router being used and not some sinister plan by Verizon on the FIOS network. The great part is…. YOU DON’T HAVE TO USE THAT ROUTER! Feel free to pick out any available ethernet router which will fully support PPPoE connections. There is nothing magical about the router Verizon provided you and contrary to the beleifs by some in this thread the only reason for Verizons choice of the router they supplied was cost (you get what you pay for).

    I have used many different routers on my FIOS connection without any problems and have found that if price is your concern a Linksys or D-Link brand DSL router is a great choice. I even used my Vonage supplied router as my FIOS connection for a while and only replaced it with a commercial router (Cisco 2651XM) recently for the additional flexability it provided me.

    What I am trying to say is please be aware that the FIOS service itself is just fine, your free router they provided for connectivity on the other hand may more accuratly reflect it’s cost.

    Off my soapbox now 🙂

  50. I got FIOS from Verizon with Coax connection to their Actiontec router. Now I wanted to add T-mobile @home as my phone service. But it doesn’t work. The phone signal goes out but no tone comes back. The T-mobile system works fine on my neighbors Comcast cable internet. Why not on FIOS? I tried different settings on the Actiontec router but always with the same result: nothing changes. I read some articles on the web. Apparently I am not the only one with this problem. The T-mobile technical support had no clue what is going on and referred to the internet provider (Verizon) for help.

  51. I got FIOS from Verizon Actiontec router model MI424-WR. The firmware version is I added T-mobile @home as my phone service. But it doesn’t work. I get nothing, nada, zero. T-Mobile says it’s a Verizon issue and Verizon says it’s a T-Mobile issue. I had a similar issue with my setup at work, although in that case I was using a Cisco 800 router with the Actiontec. The Actiontec doesnt support bridging which would help resolve the problem. At my office I had Verizon enable the WAN port. Once I connected a cable from the wan port to my Cisco the VOIP worked.
    I called Verizon to do the same at my house and now they have no idea what I’m talking about.

  52. I am planning to get verizon Fios & i already have a linksys router with vonage. can some body advise me whether it will work or not.
    thanks guys

  53. I was using Teleblend (before that sunrocket) with Verizon FIOS for almost 2 years without any problem. But for last 2 weeks, my phone is not working,
    sometimes there is no dial tone. Even when it has dial tone, iam not able to make or receive any calls from this phone. I checked with TEleblend and they said, FIOS could be blocking some ports (TCP 80, UDP 5060 through 5070 and/or UDP ports 16384 – 65535). So when i checked with FIOS, they said, they are blocking ports 80 8080 25 110. So my question here is if they are blocking TCP 80 all these time, then how come i was able to use VOIP for last 2 years. Pls let somebody who had similar experience share anything they know.

  54. I am using Vz FiOS for internet and 8X8 (Packet*) service for VoIP phone.
    Phone does not ring at time, asked 8X8 Tech Supp, they are asking me to create a DMZ in Actiontec RTR, VZ says no need for that.
    Cancelling 8X8 at end of contract, looking into Vonage, since VZ still does not have a residential VoIP svc.
    Any suggestions folks, pls inform. Thanks.

  55. Whoever that was that gave you that answer is out of touch. Most folks answered about their Verizon fios service being okay. I have the Actiontec router..the supersonic fios hookup using a coaxial cable..they obviously do not care about the best connections..or they would wire your service using CAT5 to ethernet..but no..they put a box outside..convert it to coaxial..to run thru a crappy router.
    I have used skype..and can get on it for hours..BUT..you do have to add a HIGH quality Linksys wireless-N-broadband router to get the best out of what the ancient Actiontec router does, if it did not have the state of the art coaxial cable connection..i would just give them back the Actiontec. I added the Linksys WRT160N not only for skype..but in order to be able to even use my Directv movies on demand..i needed internet to my dvr, i found out that the bonus was that skype works with an updated router like the Linksys. check out reviews on CNET for best routers for your use. I want to know why fios wastes time, energy,time with converting signals at homes to coaxial?? It screws things up..that is all. You have to basically buy a quality router and improve what they bring to that router. They shouldn’t even offer coaxial. Many new homes have built in ethernet ports..

  56. The issues is being all Fios customers will also TV services installed.
    The ActionTec router itself doesn’t has problem with any VOIP services providers, the problem is ActionTec routers with FIOS TV also, the SIP ALG and port triggering will not function properly and cause SIP Issues. As well as Verizon Westells router having the same SIP ALG issues.

    Lots of Modems routers today has SIP ALG issues – Dlink Netgear, Netopia, SonicWall, it has nothing to be Verizon, BUT, verizon’s FIOS TV should not mess up with SIP, that’s their fault.

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