asterisk users - Oct 2011 - Integration asterisk with pabx

Hi list.

 

I need to do an integration with my asterisk server with my PABX (Siemens
HiPath 3550 ver. 4.0). I have the asterisk server, 1 trunk with 30 channel
with ISDN signaling. The scenario is:

 

Call -> modem -> PABX IP -> Analog PABX

 

The PABX IP is not communicating with the analog pabx. They line up but do
not communicate, and did not get the dial tone with analog pabx. Is possible
this integration? 

 

Regards,

MS

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