2. INTERFACES
2.1 Front Panel
RST
Reset button is accessible on the front panel using a pin of diameter under 2 mm (pencil
tip, etc.). It re-initialise all modem functions. The modem must be reset immediately
on inconsistent operation appearance, before starting the maintenance diagnosis phase.
This reset, like a long duration power cut-off, has no effect on the status of
configurations previously loaded into the modem.
SET Set button is used for entering command mode (see “Entering Command Mode”
section), which allows modem configuration.
PWR In data mode PWR LED is ON when modem is power supplied and in proper function;
PWR LED is OFF in case of: power supply is not present or modem is in malfunction.
PWR LED blinks slowly (100ms / 1sec cycle) as an indication of command mode.
PWR LED blinks fast (100ms / 100ms cycle) when modem has locally initiated some
of the test modes. PWR LED blinks slowly (1sec / 1sec cycle) when modem is
remotely brought to some of the test modes.
TXD Transmit LED indicates data transmitted on TXD pin of RS-232 interface.
RTS
Request to Send LED indicates state of RTS pin of RS-232 interface.
RXD Receive LED indicates data received on RXD pin of RS-232 interface.
DCD Data Carrier Detect LED indicates the presence of in-channel carrier with level higher
then predefined receive level.
Figure 2.
IDM 50B Front panel view (desktop version)
2.1.1 DIAG – Command/Bootloader serial interface
This connector is a RJ45 8 pin female type connector. It provides the interface between
the modem and terminal unit in command mode and in firmware upgrade process. The
following table gives the allocation and function of each pin.
PIN ABB.
FUNCTION
DIRECTION
DTE-DCE
1
SW - BSL
Switch – Bootloader selection input
x
2 GND
Signal
Ground
-
3
CTS
Clear To Send
←
4 RD
Received
Data
←
5 TD
Transmitted
Data
→
6
RTS
Request To Send
→
7
SW - RUN
Switch – Run selection input
x
8
SW - COM
Switch – selection output
x
IDM50B User Manual v1.2n, Rev. date: 24 februar, 2009
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