sundance-communications.com/forum Forums VOIP Phones & IP PBX VoIP & Cloud Phones, Hosted PBX, General IP Phones Toshiba IPT VoIP phone resetting with no error message when on Linksys router only

I've got a gnarly VoIP problem here. I have 10 telecommuters on VoIP phones (Toshiba IPT-2010 and similar) connected to various ISPs: Comcast, Verizon, etc.

Through careful shopping and testing, I've managed to ensure they all have QOS-aware routers (Linksys) which helps ensure their own upstream traffic plays nicely with the IP phones. One particular Linksys configuration is suddenly giving me fits.

It's a Linksys WRT54GL v1.1 with DD-WRT firmware, configured with no exotic options, only QOS. I hook up the phone, which gets an IP address and BIPU connection quickly. To show data is moving, I set the background music on.

In 3 minutes or less (very consistently), the phone blanks out and reboots, even though the music is still playing, and I can see the router believes its still forwarding traffic and has an open IP connection. The router never reboots, and all other data keeps moving through the router just fine. Right up to the moment the phone reboots, there's not any breakup of the sound at all.

If I hook the phone up without that router, it works flawlessly. It's as if the router is sending/mangling some packet that freaks out the phone. If the phone makes it past the 3 minute point, it's rock solid.

Can anyone recommend another router for hosting a consumer-grade connection with a Toshiba IP phone? I don't want to have to go full-bore Cisco for a few hundred dollars, but if that's what it'll take to make these things work right... *sigh* So much for saving money.

SkypeIn/SkypeOut is looking very appealing about now!

How is your QoS setup in DD-WRT? I had the same issue with my WRT54G with DD-WRT and it took some fiddling with the settings. The IPT has been up and running great ever since. I'll login and see how I have it...

Here goes...

QoS is enabled on the WAN port

Mac Address Priority is setup ONLY for the IPT and set to "Premium"

Ethernet Priority is setup on the Lan ports with the IPT Lan port set to "Premium" and all others set to "Standard"

Hope this helps.

I always suggest netgear or D-link for ipt phones

linksys has been nothing but trouble, seems like you could be losing the "keep alive" packet

Ive been using the dlink drr-655 and no problems

Don't remember specifics, but yes, Linksys had some issues with their firewalls and VOIP.

Linksys uses SPI (statefull packet inspection) firewall that can't be turned off (with their firmware). Other routers use it too but usually can be disable. I haven't used that firmware before so I don't know if you can disable it or not.

SPI doesn't play nice with Toshiba IPTs. Usually when SPI is the problem the IPTs won't even register with the IPU, so I'm not sure if that is the issue here.

you get what you pay for with VPN Routers.
stay away from linksys, dlink consumer cheap routers.
you require a stable VPN Connection with no dropped packets
Sonicwall,Cisco, HP
only way to go with VOIP

We had the same problem with linksys.
swap out for a real router, problem went away.
but the real VPN routers are expensive

You can always go with an Adtran VPN router as well. reasonably priced.