Just to report back in, the advice of the list was to not worry about it- they should work well.  I took a DSL modem with a router on it and connected both phones (Grandstream GXP2k and 101)- they did not work.  I found that I had to program in a STUN server.  I also has to set it to use a random port instead of the default- a pre-defined port (else only 1 phone would ring regardless of extension).  Now they both work well.  Does anyone see a problem with this setup?  Should I use my own STUN server? or can I continue with stun.fwdnet.net?  

Also, where can I get information on provisioning?  These phones will be out of my hands soon and I'd like to be able to update the configs.  I saw a few utilities for generating the configs, but I'd like more specific info - I don't mind editing files by hand but want to know how it works. Does anyone have some resources?  

thanks for all the help- this is a great list.
     Todd


On Nov 6, 2006, at 10:28 AM, Todd- Asterisk wrote:

I've got my asterisk server in the DMZ of my local LAN - I've used my Budgetone and GXP2000's from the Internet- on direct IP connections with no problems.  However, I'm about to deploy about 5 phones (either budgetone or GXP2000's) all on a LAN behind a NAT- on a different network than the Asterisk server.  Should I look into using STUN servers?  Will this setup be a problem?  I've read about NAT and STUN on voip-info but am looking for more information..   btw- I'm not set on Grandstream.  If you think Polycom or something can handle NAT better, then I'll use that instead.  I guess there's no IAX phones yet...  Thanks in advance.
  Todd

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