For anyone that is interested I was able to network SIP trunks between my Tadiran / Coral IPx Office, and a TrixBox CE, for Details email me. This sets up similar to an IPNet Node, and it allows the customer to use any SIP phone Asterisk supports, (more than the 9 Tadiran has tested). Another benefit is all though my default you only have 5 SIP Trunks to work with you can have a large number of SIP phones with the ability to call back to a Legacy Tadiran TDM switch (Could also be used to run Analog Station cards from the Tadiran as well). Again email me if your interested.