Juniper Allegro CE Owner's Manual page 93

A Network ID tab is used to create a personal, unique identifier you
receive for accessing a remote network. In the Network ID tab, enter the
same user name, password, and domain name you use to log onto the
remote network at the office. This ID allows you to access the remote
network with your Allegro.
PC Connection
The PC Connection Properties applet allows you to change the port and
baud rate used for communicating with your Allegro and PC through
ActiveSync. The USB port is the default setting.
Windows CE Page 4-33