Hi, I have a circuit STM1 OC3 connected to router Cisco 7200 with a card PA-A3-OC3SMI working correctly, but to my I would like to be able to use a card ATM OC3 (MM) and I am looking for a converter of single-mode to multi-mode. Could I use the converter Rubytech FE-C255? http://matrix.ids.pl/index.php?act=1945 Cheers.