2 routers talking together

Hi Experts,

just a quick question, I have 2 routers and 2 internet connections at a site. 1 internet connection + Router is dedicated to a 3rd party Server called CDL which is used in insurance for EDI transmissions. the 2nd internet connection + Router is dedicated to the IP Phones / Internet Access for PC's.

the CDL server has a static LAN IP.

I am a novice when it comes to networking but I have a good overall understanding.

if the PC's and server are using different routers how are they going to be able to talk together? they will be effectively on different LAN's.

NOTE: this is regarding 4 x IP Phones, 4 X Win7 PC's, No Server / No Domain.

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according to your diagram, the only way the PC's can connect to the server would be via the internet.

this would be, if the CDL server is NAT'ed to an IP reachable via the internet.
peggiegregAuthor Commented:
well that's what I thought. but they are currently talking together. I need to unplug them move them to a new office and plug the equipment back in but I cant work out how any off it works! I have another question open at the moment (feel free to take a look) which discloses the IP settings on both the CDL server, router and PC's to see if some networking guru can put it together and say... 'ah yes that's how its setup'

it just doesn't make much sense to me how this setup can work, I made the very basic diagram to help visualise it. this wouldn't work? or am I missing something.
you are probably missing something on your diagram.

If they are able to connect to each other locally, they probably are connected locally via L2 or L3 routing. A cleaned up config of your current setup would help a lot to know how your topology is setup.

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