Forum : Cisco 7960G, SIP, NAT, Qualify and Unreachable

I just started trying to use the qualify=yes option on my Cisco 7960 SIPphones. Of the 13 I have, 2 of them seem to loose their registration withasterisk on a regular basis. I see lots of these lines:

-- Registered SIP '3030' at 62.74.107.1 port 58825 expires 60

in my console. But I only see them for 2 extensions. Never see them for theother 11. All 13 phones have the exact same configuration with the exceptionof the extension number in sip.conf and on the phone itself.

I have no idea why these 2 phones refuse to stay constantly connected likethe others.

So I am trying to use 'qualify' to get * to "ping" them to keep themregistered/connected.

I tested it on my phone which is not one of the 2. As soon as I reloadedsip.conf, I got this:

NOTICE[1087584960]: Peer '3044' is now UNREACHABLE!

And 'sip show peers' shows:

3044/matthew304  62.74.107.1      D   N      255.255.255.255  44854UNREACHABLE

and calls to that phone get pushed to the 'unreachable' category in mydialplan.

Its been like that for the past 20 min. Why isn't anything happening?Should't I be getting some notice every 2 seconds (the qualify default) thatsomething is happening?

Thanks,