Modem doesn't seem to work on a Full Speed USB interface
When connecting the H5/H6 to a Full Speed USB interface, you may need to apply power to the H5/H6 first before the allowing the host device to enumerate on the USB bus. 1. Apply power to the H5/H6 modem 2. Wait 1 second 3. Allow the USB host to connect or power up We have seen cases where the Telit radio gets stuck in boot when interfacing to Full Speed USB on power up and the host attempts enumeration right away.