I'm using a 56k internal modem w/ CL-MD5650 chipset (x2 technology). Every time my modem attempts to connect @ 56K to ISP w/ USR server, there is a continuous tone then hang-up. I can only connect @ 33.6K or below without problems. I checked this in my modemlog file which indicate NO CARRIER @ 56K connection attempt. Any explanation and/or suggestions?