(This is an older blog post I finally decided to publish. Perhaps T-mobile’s VOIP @home system works now that it’s 6 months later. I guess this is the price you pay for being an early adopter — or at least with T-mo.)
OK, so I made the certification thing up. But I really think that anyone who has enough technical skill to set up T-mobile @home service successfully should earn a Certificate in IP Telephony Repair from ITT Tech. Here’s what you need to know to get your router working properly with Comcast (By the way, I am now an official, card-carrying member of the Linksys Support Forums):
The trick that fixed it for me was opening port 5060.
SIP uses UDP (and sometimes TCP) on port 5060. I believe SIP is needed for any VOIP calls. So the way to open port 5060 is to make sure that that port is not being forwarded to any IP. For example in Application and Gaming
Regards,
MrBinum
Hmm… UDP, SIP, TCP… Got all that? Good. So here is what you actually need to know in order to open port 5060: Assuming you have the standard WRTU54G-TM router, go to Applications & Gaming –> Port Range Forwarding. Then enter whatever under Application (I put “VOIP” but I don’t think it matters). Next enter “5060” under Start and “5060” for End. This is the port you want to open. Then put “both” for Protocol (both means TCP and UDP). Now enter your router’s IP Address. It should be 192.168.0.1. Finally, check “Enable.” This seems to be working for me now, but please correct me if my instructions are wrong. Hopefully this will help others to figure out how to get their VOIP working consistently. Tom
Isn’t that obvious to everyone?
@Trent
Obviously not. There would not be 100s of people trying to figure out how to fix it if it was. Thanks for giving me credit Tom. The T-Mobile @Home has been upgraded and is very stable now. Whoever is interested should definitely get this service. Only downside is no faxing, but that can be easily fixed by using an online faxing service such as trustfax.com. Enjoy this great service!
Regards,
MrBinum