Building a CCIE lab and have a 2523 for my frame switch with DB60 connectors...problem is, all of the T1 cards in my 2811s are 1DSU-T1 V2 which have RJ45 connections. This is not a problem for the point to points, but does seem to present one for the frame switch without getting the smart serial cards for the 2811s. Any cabling suggestions for connecting from the 2811 with the RJ45 connectors to the 2523 with the DB60? The only adapter I've found doesn't seem to like the signaling conversion; I can get CD on the WIC, but the 2523 interfaces bounce constantly with %CIRRUS-5-LINEFLAP - excessive modem control changes. Thanks in advance.