You have to consider the size of phone network, call duration, usage and speed of the internet which will host as a communication network.
geograpic locationmediumnumber of posts
factors to consider when installing computer network
the geographic scope of the network the physical layer implementation the number of hosts to be interconnected
internet
Redundancy Requirements
How much the business is willing to pay them.
* Purpose * Geographiclocation * Ownership
Purpose . Geographic location . Ownership
ring/hybrid
Tree Topology allows for the expansion of an existing network
-The geographic scope of the network -The physical layer implementation -The number of hosts to be interconnected
Fiberchannel would require additional investments into the network - FC wires, switches, etc. while iSCSI can be implemented on the run into an existing infrastructure. I have recently ran into a problem where we needed a fast and easy solution for implementing into an existing network configuration. I have found StarWind Server (www.starwindsoftware.com) - their solution saved me from lots of work and investments.