I have a customer with three office locations. All three locations are connected with two T1s. I originally set this up with Cisco 1720 routers at each location. I have since replaced two of the routers with Cisco 2620XM routers, because this client has some IP-based phones that need QOS capability.
Location 1 - Cisco 1720; has 1 serial WIC connecting to Location 2 and an ethernet WIC for an inbound VPN to an internal VPN concentrator
Location 2 - Cisco 2620XM (formally a Cisco 1720); has 1 serial WIC connection to Location 1 and DSU WIC connecting to Location 3.
Location 3 - Cisco 2620XM (formally a Cisco 1720); has 1 DSU WIC connecting to Location 2.
Each location has its own network - Location 1 - 192.168.0.0; Location 2 - 192.168.1.0; Location 3 - 192.168.2.0
There is a PIX firewall at Location 1 that supplies Internet access to all locations
The T1 that runs between Location 1 and Location 2 is provisioned for voice and data; I don't know the exact amount, but I would say data is no more than 50%.
As you can imagine, the T1 between Location 1 and Location 2 is getting quite slow, with all of the Internet and data traffic. The phone guys for them setup a phone server at Location 2 and it connects to IP-based phones at Location 3. That is when I upgraded the old Cisco 1720 routers with the Cisco 2620XM routers at Location 2 and Location 3.
Now they want to add an additional T1 between Location 1 and Location 2 and move the data to it to increase performance, but they also want to add about 6 more IP phones to Location 1 that will connect to Location 2's phone server.
I have ordered another Cisco 2620XM router for Location 1, and plan on moving the WICs and configs to the new router.
The phone guys want to have the QOS capability through the new router, but I will only have 2 WIC slots in that router (and still will only have 2 after upgrading) and they are both being used.
The grand plan is to put the phone network on its own IP block (192.168.5.0) to get it by itself. But the phone guys want to have it accessible by the other networks and also have the QOS capability of the router.
It looks to me like I have to run both T1s and the VPN connection into the new router at Location 1, and all three T1s into the router at Location 2, but that would require 3 WIC cards, at Location 1 and Location 2. I only have 2 WIC slots. I know there are expansion options to give me more slots and stuff, but I am clueless to what I actually can use or need.
Can anyone tell me how I can do this? What parts do I need?
If you need a detailed drawing of this, I can give it a try and upload something.
Thanks in advance...