I'm in an office with 2 separate T1s and 1 DSL. The T1s are also providing digital voice lines. The workstations are split between the three providers for data access. The office printers are connected to one of the data providers. What is the easiest way to share resources (printers and eventually a new server) between the three networks? All three provider routers connect to different models of Linksys switches.

Voice T1's are dedicated to phone systems. That does not appear to be what you have when you say "The T1s are also providing digital voice lines." You can not use the voice t1 for data. Might want to clarify this. You can purchase a dual wan port router which will take the T1 and the DSL to either combine bandwidth or provide failover. This will make all devices on the lan into a common network.

To clarify, the two T1s (from two providers) provide data, and the same carriers are providing SIP trunks for voice usage. So each router from the provider connects to it's own switch, and they both connect to our PBX. The DSL connects to it's own switch as well.

How many sip trunks are being supplied per T1? Looking like you would need a layer3 switch to put the three accesses together. You won't be able to replace the routers containing the sip trunks.

Let's forget about voice all-together. That is managed with a provided solution. I'm just looking to connect the data networks--make resources available across the networks.

You have to connect all three to a router or a layer 3 switch. This way you can have three different subnets on the "wan" side of the router and one lan segment all in the same subnet. Or, if you have the ability and access, you set all three routers lan segments to the same subnet. This gets complicated. Here's why; 1. you have three gateways 2. you have the potencial of three dhcp servers Easiest thing to do is the following; Disable all dhcp servers Statically assign gateway and ip to the workstations/network devices. Set the routers as follows; Router1 192.168.1.1 Router2 192.168.1.2 Router3 192.168.1.3 All routers should go into a switch [managed preferred] From there they go to the printers/pcs. Some you would point to gateway 1, some to gateway 2 and some to gateway 3. You are doing a manual load balancing. Make sense?

Makes sense. Thanks for the assistance.