On Sep 9, 2010, at 2:06 PM, Aloysius Lloyd wrote:

1. Yes Phones Behind NAT.

FreeSWITCH [ Public IP] ----------- ---- Linksys Router ------- Linksys IP Phones

2. Can you help me to understand what is not configured properly.

The phone should overcome their own nat... its not the registrars job. Thats just my opinion.

3. wiki says this is Tested. Here is the content from wiki [http://wiki.freeswitch.org/wiki/Shared_Line_Appearance]

Make sure it has the latest firmware.

Linksys/SPA
Tested on SPA-942 firmware 6.1.5(a)
Setup the handset as per normal to register to the extension you are going to share.
In addition under 'Share Line Appearance' in Ext 1 (or which ever line you are using) set 'Share Ext:' to 'Shared'
Under Phone, Line Key 1 (Or whichever you are using), set 'Share Call Appearance:' to Shared

Thanks
Lloyd