2N VoiceBlue Next v3.0 - Manual (Page 25)

Brief Installation Guide 2.3
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3) Place the GSM gateway pair into a free 1U place in the system rack and fit it
with four rack screws (included in the package).
Caution
 The rear and upper connecting plates have different holes – the upper
plate holes are larger and without threading.
 Make sure that the plate does not get into the device to avoid electric
short-circuit inside the GSM gateway.
 Leave 2 cm free space at least over and under the GSM gateway for better
ventilation (airflow)!
Power Supply Connection
Use only the power supply adapter included, or, with the power over Ethernet, a
certified PoE adapter to feed the gateway. Make sure that the electric distribution
network voltage is in compliance with the data on the supply adapter plate before
plugging the adapter. First plug the supply adapter into the mains socket and only