[Asterisk-Users] what should i select ??????????

[ishtiaq Ahmed]

hy all
actually i want to have a setup of five offices having round about 200 extensions ( each office having 35 to 45 ) which will be connected through asterisk.
now either i should go for voip phones( hard phones ). or use any interface card to asterisk server to which the analogue phones will be connected. 
 
----- if i use analogue phones in the above case ( we have analogue phones already ) which card should i use.( plzz mention the name of card provided by digium ).
 
---- i think using some interface cards( for analogue phones and one card for each office) will be cheaper than buying about 200 voip phones. 
 
what do u think????
i will be waiting for ur value able suggestion. i have searched alot for this noone has given me a clear suggestion ( mean to say answer at the max 20% of my question ).
  

		
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