When you use NET USE or NET VIEW across a Dial-On-Demand router or slow link and
the connection attempt is longer than 45 seconds, a “Semaphore Timeout” error
message appears. By default, the Windows NT redirector time-out value is 45
seconds, which limits the length of time a connection is made. To change the
redirector time-out value:
Hive: HKEY_LOCAL_MACHINE
Key: SYSTEM\CurrentControlSet\Services\Rdr\Parameters
Name:
ConnectMaxTimeout
Type: REG_DWORD
Value: Number
of seconds
Documented default is wrong: Q148127 – DocErr: ConnectTimeout and Default Time-out Are
Incorrect