asterisk users - Mar 2010 - Grandstream HT 503 Outoing 403 Forbidden

I am trying to get Asterisk 1.6.2.5 working with a Grandstream HT-503 ATA. 
The FXO part is giving me fits. Every call I try to make to the FXO port 
outbound I get 403 Forbidden coming back. I've been through every 
configuration setting I can see, and Uncle Google is not helping me much. I 
updated the firmware to the current version, and that didn't help.

If anyone has this working, I would like to know the secret sauce.

-Thanks, Jim

On Sun, Mar 7, 2010 at 9:18 PM, Jim Rosenberg <jr at amanue.com>
wrote:
> I am trying to get Asterisk 1.6.2.5 working with a Grandstream HT-503 ATA.
> The FXO part is giving me fits. Every call I try to make to the FXO port
> outbound I get 403 Forbidden coming back. I've been through every
> configuration setting I can see, and Uncle Google is not helping me much. I
> updated the firmware to the current version, and that didn't help.
>
> If anyone has this working, I would like to know the secret sauce.
>
> -Thanks, Jim
I have the HT-503 configured and working, although I'm not using Asterisk.
You can read more about the whole setup here:
http://www.sabadelli.it/edoardo/archives/grandstream-ht-503,-pbx,-sip-my-recipe-for-voip.
You might find something interesting...

I suggest to have a look at the Grandstream forums, I found some help
there, or at least some ideas about the cause of some problems I
experience sometimes.

HTH,

-- 
Edoardo