asterisk users - Jun 2004 - Siemens Optipoint 400 standard SIP

Dear,
 
Is there somebody who have experience with the Siemens Optipoint 400 standard
SIP ?
And where can we buy it (i'm from belgium) 
 
We are using for the moment Cisco 7960, 7905, snom 200, Mitel 5055 and in my
opinion the Mitel does his work the best combined with the 7905,
 
the 7960 is realy anoying to transfer,
On the snom 200 you can't dial a number veryfast due to the
"rubber" buttons
 
Thank you 
 
Michael

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