I have two IP phones 7912G and a number of 2600 series routers (2620xm using IOS version c2600-jk9s-mz.122-24.bin) and (2611xm using IOS version c2600-jk9s-mz.122-24.bin) and (2621xm using IOS version c2600-jk9s-mz.122-24.bin). Im using ENTERPRISE PLUS IPSEC 3DES software feature set.
I would like to update the IOS which will support voip, however, I want the output commands of the new IOS to be compatible with the current IOS Im using (for teaching purposes).
I just want set up the basic network configurations (IP phone to router to IP phone. Is it enough equipment for this basic network? Do I need any other software/hardware? e.g. CME, ect.
For normal voip stuffs u can make use of the ip plus feature set but here you want to go for 3DES too would suggest to check out this link to find out the compatible ios code on urself wich can suit in ur requirment.
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