I currently have two t1 interface cards, two built in fe ports, and an NM-2W (two wan interface slots) network module. Looking here
Cisco 2600 Series Multiservice Platforms Interfaces and Modules - Cisco Systems; it looks like the only options I have for adding fe ports are the NM-1E and NM-4E modules (network modules with 1 or 4 FE ports). Is that correct? It looks like they didn't make a compatible interface card with FE LAN for the 2600, only the 1700 series. I only need one more FE, I was hoping I could get away with a single card (since we're not using the T1 interfaces); if I have to purchase a module, I might as well get the NM-4E. Thoughts? Cheats? Does the 1700 series interface card work in a 2600? I want to spend as little money as possible as this fe port is really just for some temporary routing until this project is finished.