User guide

Chapter 1 – Product Description and Specifications
Multi-Tech Systems, Inc. MultiModem iCell Intelligent Wireless Modem User Guide 7
Front Panel
The front panel is designed with two groups of LEDs that display modem activity and signal strength. The first group of LEDs
display modem activity, such as transmit and receive data, carrier detection, link status, terminal ready indicating connection to
the pc, and the power indicator. The three Signal LEDs display the signal strength level of the wireless connection. The SIM
door on the right side of the modem provides access to the SIM card holder for those configurations.
LEDs
LED Indicators
TD Transmit Data. Lit when modem is transmitting data. Not valid while in USB mode.
RD Receive Data. Lit when modem is receiving data. Not valid while in USB mode.
CD Carrier Detect. Lit when data connection has been established. Not valid while in USB mode.
LS Link Status Dependent on Model
MTCMR-G MTCMR-H MTCMR-E
Continuous “on”
state indicates that the
wireless modem is not
registered on the
network.
Flashing state
indicates registration
on network.
Off state. Modem is
off (not ready) or in
download mode.
Continuous “on” state
indicates that the wireless
modem is registered on the
network.
Flashing state Indicates
attempted registration on
network.
Off state. Modem could
not register
Permanently off. ME is in one of the following
modes: Power Down mode, Airplane mode Non-
Cyclic Sleep mode with no temporary wake-up
event in progress.
600 ms on/600 ms off
Limited Network Service: No SIM card inserted
or no PIN entered, or network search in progress
or ongoing user authentication, or network login
in progress.
75 ms on/3 sec off
Idle mode: The mobile is registered to the GSM
network (monitoring control channels and user
interactions). No call is in progress.
75 ms on/ 75 ms off/75 ms on/3 sec off
One or more GPRS contexts activated.
500 ms on/ 25 ms off
Packet switched data transfer in progress.
Permanently on
Depending on type of call:
Voice call – Connected to remote party
Data call – Connected to remote party or
exchange of parameters while setting up or
disconnecting a call.
TR Terminal Ready. Lit when modem is transmitting data. Not valid while in USB mode.
PWR Power. Indicates presence of DC power when lit.
Signal
Indicates the wireless signal strength. Refer to Signal Strength LEDs below.
Signal LEDs
In order to verify signal strength, you must use a terminal application such as HyperTerminal. Refer to Examples of Useful AT
Commands in Chapter 3 of this guide.