Powering Devices On And Off; Powering On The Device; Powering Off Or Rebooting A Device - Multitech MTD-H5 User Manual

Powering Devices On and Off

Powering On the Device

These devices are USB powered and do not have a power button.
Note: Make sure the USB hub, whether external or internal, can provide adequate power. Max Peak current is in
the range of 700mA for EV3 and 1.2A for H5. Refer to the device's User Guide for more information.
If the host system can't provide enough power, then the 5V rail bounces, which causes the modem to lose
power prematurely and could damage to the modem. Each port on the USB hub should support 500mA at
5V. If the system has inadequate power, voltage droops when additional devices are plugged into the hub
(for example, when a modem is plugged into first port, plugging a USB flash drive into the second port,
causes the modem to reset).
To power on the device:
1. Plug the device into the USB port and give it time to initialize.
2. Wait 10 seconds after plugging the device into the USB port before giving the modem any commands. The
10 seconds allows the modem to reach the activation state.
Disconnecting it or shutting off the computer, turns it off.
Note: When reconnecting the device, use the same USB port that you used when installing drivers. Otherwise, you
may need to re-install the driver.

Powering Off or Rebooting a Device

To power off your device:
1. Suspend dial-up networking to disconnect the data connection and keep the application from attempting
to redial.
2. Suspend any other modem queries. (Sometimes separate apps are talking to the modem, initializing, or
accessing modem status information.)
3. Wait for Steps 1-2 to complete so the modem is disconnected.
4. Issue AT#SHDN and wait for OK.

You can issue this command through a power down app that sends this command before removing
power.

Some terminal communication scripts send AT commands to the modem.
5. Wait 30 seconds after the OK to allow the radio to disconnect from the carrier and close out file systems.
It is now safe to remove power or unplug the MTD.
7 QuickCarrier USB-D MTD-H5 and MTD-EV3