Juniper Allegro CE Owner's Manual page 133

5) If the cable is connected to COM 1 on the PC, the Progress box of
the Checking COM Ports screen says Looking for a Mobile device...
Checking on COM Port 1, double-tap on the PC Link icon on your
Allegro desktop.
After tapping the PC Link icon on the Allegro desktop, a screen
that says Connecting to Host is shown. After a connection is made,
the following screen briefly shows on the Allegro:
If you are unsuccessful in your connection go to the An Unsuccessful
Connection section found later in this chapter.
If using COM 2 on the Allegro, wait for the Progress box of the
Checking COM Ports screen indicating Looking for a Mobile device...
Checking on COM Port 1 to advance to Checking on COM Port 2.
Windows CE Page 4-73