Solved: Which topology is more robust (PSAP)?

news2010a · ‎02-09-2007

Hi, I have an exercise here that I can't quite understand why 'Diagram B' and not A is the best answer. If you have a chance, can you please help me understand why 'Diagram B' is the best choice? Please find diagram attached.

Thank you very much!

Question:

"You have a customer that has a site which is connected to two

different PSAP areas for E911 emergency calls. The current legacy

PABX has been provividing service for all telephones on the campus.

The client is now looking to install Cisco CallManager. Which of the

solutions will provide 'seamless' connectivity between the

legacy PABX, the Cisco CallManager and the 2 PSAPS ?

Please refer to the attached diagram."

paolo bevilacqua · ‎02-09-2007

Hi News,

Diagram B is good because a single router connects everything and PBX has also direct links to PSTN.

Diagram A is bad because PBX and CCM have no links.

View solution in original post

paolo bevilacqua · ‎02-09-2007

Hi News,

Diagram B is good because a single router connects everything and PBX has also direct links to PSTN.

Diagram A is bad because PBX and CCM have no links.