I've got an IPT project of +500 IP Phones with one CCM 6.1 Cluster and two voice gateways,
customer has 1 Head Quarter and 9 Branches ..
i want some clarification for design this project .... i have two options for deploy this project
Option-I) Either i keep cluster (Publisher + Subscriber) at there HQ which is a central location and all branches will connect via WAN.
Option-II) Or i keep Publisher & one Voice Gateway at HQ or Subscriber & other voice gateway at one of Branch.
Customer is forcing me to go for second option, the reason from his point of view is this that what if HQ goes down !!!! if he would have subscriber at other branch so the whole network would have backup !!!!
can any one suggest me which option should i go for ???? or tell me what would be the dependencies or restriction or effects i would have in both of the above options ....
i saw design guides at cisco.com ... most of the network design in guides has cluster at one location ....
can any one assist me, what should i do & which option should i go for ???