Configuring Pap2 for onesuite.com

I successfully unlocked a Linksys pap2-na v1 ata (the struggle with that some other day). (This was actually advertised in ebay as unlocked, but turned out to be a locked one with the previous user's account still active and working). Once it is liberated I configured it to use the excellent voip phone service of onesuite.com.
The configuration I found to work is as follows:

Logged in as admin

System tab
dns server order: dhcp, manual

Sip tab
substitute VIA address: yes
send resp to Src : yes
stun enable: yes
stun test enable: no
stun server : stun.softjoys.com

Nat keep alive intvl: 15

Provisioning tab:
provision enable: no
resync on reset: no
profile rule: /init.cfg

Line1 tab:
nat mapping enable: yes
nat keep alive enable: yes

proxy: voip.onesuite.com
use outbound proxy: yes
outbound proxy: voip.onesuite.com
use ob proxy in dialog: yes
register: yes
register expires: 180

display name: yourname
userid : youronesuitid-voip.onesuite.com
password: ********
auth id: youronesuitid-voip.onesuite.com

I hope this is useful.
This was bought to set up a voip phone for my friend. I am using rt31p2 with onesuite without any problem for many months now. On that I didn't use stun server. Somehow pap2 is not able to make outgoing calls without it. I saw some hint somewhere that it might be due to some network situation in my house having two routers in cascade.
Outbgoing calls did not work reliably without enabling the outbound proxy settings.

If you find anything please add it in the comments.

Arun

Update (5-Jul-2009): Onesuite doesn't allow 1-800 numbers on their voip due to some strange (and counter-productive, I believe) reasons. These days I am using callcentric.com. The quality of service is very good.