Details

A3LA-RS Iridium Data Modem
It is approximately 60% smaller in volume and 50% lighter than the 9522B.
RF Board: Iridium Core 9523 Voice and Data Transceiver Module

Key Features
Does NOT support voice
Low-cost
Small form-factor
Capable of SBD, SMS, data switch, and RUDICS
RS-232 interface
Functionally is the same as the 9522B
~60% smaller in volume than the 9522B
~50% lighter than the 9522B