Looks like the 2691 was 3 WICs and a NM port which I believe would support 2WIC, 2WIC 1FE, or 2WIC 2FE. So you could have up to 5 T1s on this setup. Are you using the WIC 1DSU-T1 card or the WIC-1T card? There is also a 4 port or 8 port IMA card that will work in the NM on the cisco 2600 series. This is an ATM Inverse Multiplexer card that will take multiple ATM lines and make one big port for the router. Then you could run ATM pvcs to each location and have room to expand up to 8 T1s or aprox. 12.2 Mb on the mainsite. We are using this setup with aprox. 200 remote sites using frame-relay terminated into a 6 T1s on our IMA port. I also have some phone numbers of companies that we have purchased used cisco gear from. They should have some 3600 series routers and are way cheaper than Cisco.