How to connect G450 MG's on different floors - Digital Phones

[namesrhard2pick]

Hi,

I am installing (2) G450 MG on the first floor with and ESS server and (2) G450 MG on the second floor. I will have a Cisco 3560 on each floor connected via fiber. I am installing digital phones and I am just trying to understand how the gateways on the second floor will get dial tone and access to the PSTN when not directly connected to the other G450s? Is this all done throught the Cisco switch fiber line?

 

[IPOthermia]

The short version is that PSTN access is gained by access to an ARS location. The location is assigned to the G450 media gateway in the server. All of the G450's are registered back to a common server and aren't interoperating with each other, but with the server that is controlling them. The G450 is what provides dial tone to the digital phones.

Digital phones are hardwired to the G450, and the G450 turns all communication into a VOIP packet stream until the device is connected by way of IP to a G450 that has a T1, analog trunks, etc.

Using the AVAYS S8300 as an example:
There can be 50 locations.
There can be 50 ARS tables, and an ARS ALL table.
There can be 50 Media Gateways such as the G450
There can be 99 trunk groups
There can be 250 IP Network Regions
There can be 254 route patterns.

A digital phone learns its location from the gateway it is connected to, from there it uses the location to access an ARS table, the ARS table selects a route, and the route defines a trunk to use to get to the public nework.

Digital staion #2304 connected to media gateway #4 (G450) location #4 looks to 'ARS location' #4 for a long distance call that will use route pattern #11 and send the call on trunk #20
The numbers don't matter, but this is a rough idea of the sequence of events to make an outbound call.

Voip staion #2305 at IP address 10.20.30.4 checks the IP-Network-Map and learns it is in IP-Network-Region #4 which is defined as location #4, it uses media gateway #4 for resources since it is also tied to location #4 in programming. It then looks to 'ARS location' #4 for a long distance call that will use route pattern #11 and send the call on trunk #20.