User's Manual

FCC Documentation
MM-5500SU CDMA 1X/EVDO Modem
15/15
Confidential and proprietary information.
This document is the sole and exclusive property of Maxon Australia.
Not to be distributed or divulged without prior written agreement.
5.3 RS-232 part (MM-5500SU interface board)
The MM-5500SU wireless modem communicates with PC for DM(Diagnostic Mode) port that
indicates the CDMA modem’s status. The CDMA Engine contains UART(Universal
Asynchronous Receiver / Transmitter) for DM. The CDMA Engine provides 3.0V CMOS level
signals and it is translated to RS-232C signal level at the MM-5500SU interface board.
5.4 USB interface part (MM-5500SU interface board)
The MM-5500SU wireless modem contains a USB (Universal Serial Bus) interface to provide
an efficient interconnect between the Modem and a Host (PC). The MM-5500SU wireless
modem’s USB interface is designed to comply with the Universal Serial Bus specification,
Revision 1.1.
The MM-5500SU wireless modem’s USB interface supports full-speed (12Mbps) data rates.
5.5 LED driver part (MM-5500SU interface board)
Signals outputted from the CDMA Engine are used to control ON/OFF of LEDs.
Table 8. LED Display description
LED Display Description
PWR Indicate the CDMA power on
PKT Indicate connection in Packet Switched mode
RSSI
Lights on in RSSI > -95dBm,
Blinks in -95dBm > RSSI > -105dBm,
Turn-off in RSSI < -105dBm
SMS LED Blinking is unread SMS message exist