User manual

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CHAPTER 1
INTRODUCTION
Maestro 100 / Maestro 20 is a ready-to-use GSM modem for voice, data, fax and SMS services. It also
supports GPRS Class 10(Maestro 100) or Class 2(Maestro 20) for hi-speed data transfer. Maestro 100 /
Maestro 20 can be easily controlled by using AT command for all kinds of operations. With standard 9-
pin RS232 port and telephone-like audio plug (via optional cable) the Maestro 100 / Maestro 20 can be
set up with minimal effort.
1.1. Package
The Maestro 100 / Maestro 20 package should include the following:
1.Maestro 100 x 1
2. Power cord with fuse x 1
3. Safety note x 1
1.2. Interfaces
1.2.1. Status indicator
The LED will indicate different status of the modem:
- off Modem switched off
- on Modem is connecting to the network
- flashing slowly Modem is in idle mode
- flashing rapidly Modem is in transmission/communication (GSM only)
1.2.2. SMA female antenna connector
- Connect this to an external antenna with SMA male connector. Make sure the antenna is for the
GSM900/1800 frequency with impedance of 50ohm, and also connector is secured tightly.
SIM holder eject button Status indicator
SIM holder
4-PIN connector (Power, Input / Output)
15 pin Sub-D Female Connector
(RS232/Audio)
SMA female antenna connector