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2N TELEKOMUNIKACE a.s., www.2n.cz
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GSM/UMTS Board
eBoard Description
The GSM/UMTS board contains two GSM or UMTS wireless modules, circuits for their
connection to the PCM bus, and DTMF receivers (+CPU in the case of board with the
support). The board is designed on a 4-layer PCB of the size of 2N SIM Star
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160x100mm. Pins 1 and 32 are approximately 1 mm longer in the GSM board system
connector and are used for 'hot swap' power feeding, allowing to push the board in and
out even during operation. This feature is especially handy while installing or replacing
SIM cards. Two SMA antenna connectors and 5 board status indicators are located on
the front panel.
PWR – Board supply indication
Shining: Switched on.
Flashing: Board in the sleep mode.
INIT – Board initialisation indication
Shining: Board faulty or not yet initialised.
Flashing: Board initialisation failure or system incompatibility.
SLP – Board sleep state indication
Shining: Both wireless channels manually blocked.
CH1/CH2 – Wireless engine state indication
Shining RED: Wireless engine blocked or switched off.
Flashing RED: Wireless engine restart in progress.
Shining GREEN: Proceeding call.
Flashing slowly GREEN: Call terminating or voice settings in progress.
Flashing quickly GREEN: Wireless engine trying to log in.
Light off: Wireless engine ready for calling.