Gsm/umts board, Eboard description – 2N StarGate/BlueTower v5.7 User Manual

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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

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.