Alan writes;

There is another router vendor who has OC-12 router interfaces ... There is a choice in the market today for OC12 router interfaces. -alan

Let's try to define the terminolog; oc3 3*sts-1 (=3*ds3) oc3c 3*sts-1 concatenated (vc4, or one container 1920 bytes) oc12 12*sts-1 (=12*ds3) oc12c 12*sts-1 concatenated (can carry a STM-4, 7680 bytes) Most (all?) data equipment uses ocXXc chanels, so I asume that is what we are talking about. ATM OC12c-celltax = 'oc9' worth of IP traffic (467M) POS OC12c-frametax = 'oc11' worth of IP traffic ((580M) This is before we look at system performance, routers understand IP, Switches does not. -Peter