Seperate group or Instance for each branch office in Call Manager ?

Can I configure the call manager for the branch offices to have separate groups and each group have their own extensions e.g I have CM in Head office and I want to connect the branch offices,but I want each branch office should have their extensions. e.g Branch A (200,201,202,..up to 2010) and Branch B extensions are the same (200,201,202..upto 2010) and same up to 50 sites ?
And each branch should not call the other branch office, if they want then they should call by press 9 and outside PSTN numbers.

Any help will be appreciated.

Thanks
superluditeAsked:
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harbor235Commented:


Yes you can, you may create whatever dial plan you desire. The number of phones/sites you can configure will be based on your hardware platfrom and your network, but in general all that you are asking can be accomplished via Call Manager.

harbor235 ;}
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superluditeAuthor Commented:
Thanks Harbour for your great reply! I have Headoffice and CM 6 is installed in HO and operating, but we want 50 branch offices in two different countries, to connect to this central CM, but like I said earlier, the branch office must be in the  separate groups and each group have their own extensions  e.g Branch A (200,201,202,..up to 2010) and Branch B extensions are the same (200,201,202..upto 2010) and same up to 50 sites, but these branch (10 internal extensions) should only be dailed internally, if Branch A wants to talk to Branch B, call should go via PSTN ?
- Can you provide any guid notes ?
-Also for each branch office, I am going to install 2811 with E1 lines and DSL line. which should be more then enough for each site.
- what dail plan to install for 10 extensions ?

Thanks
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superluditeAuthor Commented:
Thanks, I will have a look into these links!


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