Busy signal upon pickup

**jlachowin** · 02-13-2010 06:42 PM

Been having this on going issue where sometimes we get a busy signal up answering. Linksys phone adapter, behind a Asus WL-520 router, have the proper ports forwarded, even had VOIPO support take a look at my router settings.

Anyone else have this issue and were able to fix? My wife just called from her cell phone (AT&T) 3 times in a row, every time I picked it up it was a busy signal. If I don't fix this within the next week, I will have to look at another provider unfortunately.

Thanks for any assistance, Justin

**voipinit** · 02-13-2010 08:02 PM

It sounds like it's a router issue, there are a number of settings in the router that can cause that. Continue to work with Voipo support and make sure they know you are still having issues.

**VOIPoTim** · 02-13-2010 10:17 PM

I'm not sure how router savvy you are, but if you are, please try expanding the forwarding range to 5004-65000 and see if that resolves it.

The audio does not go through the VOIPo network 99% of the time and is a direct connection between your adapter and the underlying carriers delivering the call and in some cases we've seen recently, audio was sent on a lower port than 35000 (this is something new) and opening the entire range fixed it for the few examples I've seen. The port is different for each call and this is why it can appear sporadic (letting some ports through but then another call uses a different one that it blocks).

Also if the router has a SIP ALG setting, that should be disabled.

**burris** · 02-14-2010 04:50 AM

I have the same ASUS router and same hook-up and don't have any ports forwarded...Important to disable SIP ALG.

I now have WRT on my router, but even with the default software, I never had this problem.

**jlachowin** · 02-14-2010 08:04 AM

I'm using the latest Tomato firmware, and it doesn't have an option to disable SIP, I will look into flashing it to DD-WRT.

**usa2k** · 02-14-2010 09:47 AM

Originally Posted by jlachowin

I'm using the latest Tomato firmware, and it doesn't have an option to disable SIP, I will look into flashing it to DD-WRT.

I am using Tomato 1.23 on a WRP54GL without forwarding or issues.
Device is a PAP2T here.
My Modem is an Ambit supplied by Comcast.

What ISP and Modem are you using?

No insightful answer, just looking at the evidence ...

It sounds like the phone rings when your wife calls from her cell?
But when you pick up, you hear a busy signal?

**usa2k** · 02-14-2010 12:01 PM

Have you been able to test without the router in place?
(Such a test would be an extreme sacrifice for me!

)

**jlachowin** · 02-14-2010 04:51 PM

Originally Posted by usa2k

I am using Tomato 1.23 on a WRP54GL without forwarding or issues.
Device is a PAP2T here.
My Modem is an Ambit supplied by Comcast.

What ISP and Modem are you using?

No insightful answer, just looking at the evidence ...

It sounds like the phone rings when your wife calls from her cell?
But when you pick up, you hear a busy signal?

I'm on AT&T Elite DSL (dry loop) with a Motorola DSL modem. When she calls, the phone rings like normal, with Caller ID info, I pick it up and get a busy signal.

**usa2k** · 02-14-2010 05:22 PM

DD-WRT might be worth trying.
http://www.dd-wrt.com/site/support/router-database
I see three types WL520G, WL520GC, WL520GU.

A lot of people claim DD-WRT is more consistent.
I've not tried it because if it ain't broke, don't fix it!

Only problem post I see people having were old threads.
Looks like there is Elite DSL and U-Verse Elite DSL out there.

**VOIPoTim** · 02-14-2010 03:36 PM

Originally Posted by jlachowin

I'm using the latest Tomato firmware, and it doesn't have an option to disable SIP, I will look into flashing it to DD-WRT.

Yes, definitely look at Tomoato --> DD-WRT. We see a TON of problems with Tomato for some reason and I there have been at least a dozen people who made the switch and have their issues go away.