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7200 Connecting to Router through modem & AUX port but cannot type

I am having trouble connecting to a Cisco 7201 by the AUX port with a modem.  The modem is a US Robotics 56K plugged into AUX port and I am dialing into the modem.  It connects and then I am prompted with our banner and login prompt but I cannot type anything.  After a few seconds it will display some characters that almost look like an initialization string.  I have tried lots of different things, including changing speed,  autoconfigure types, different modems, different phone lines, etc.

Current config is

line aux 0

exec-timeout 15 0

password 7 *************

logging synchronous

modem InOut

modem autoconfigure type usr_sportster

history size 100

no editing

stopbits 1

speed 115200

flowcontrol hardware

I have searched and searched on google and came across some that have had similar issues with 7201 but never any fixes.  We probably have close to a hundred 2600, 2800, 3700, and 3800 that do not have this issue.  We only have 2 7201s and they both have the same issue.

Any help is greatly appreciated.


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