Northern Telecom NAC Installation Manual page 48

Please note the following abbreviations for connection type:
DC Direct connection
24 Dial-up connection at 2400 baud
96 Dial-up connection at 9600 baud
Note: The "Connection type" column in the following table lists all of
the possible connections. Some connection types cannot be applied to
some devices available. For example, the only connection type possible
for a printer is direct connection. Ensure that you do not select an
inappropriate connection type.
Network Administration Center (NAC) Installation Guide Product release 2
Hardware installation 3-23