A customer has four small sites and each site has its own communication Server (CS)1000 Rls 7.0 system. They want to network the sites using a sample dialingplan which allows a telephone user to…

A customer has four small sites and each site has its own communication Server (CS)1000 Rls 7.0 system. They want to network the sites using a sample dialingplan which allows a telephone user to call another telephone user directly by dialinga primary Directory Number (DN), without an access or location code. The current network does not have any Directory Number conflicts or duplications. Which dialing plan should be implemented?