1.2.4
Audio
The M2MBoxPro provides a 4P4C connector to connect directly to a phone handset.
The pinout is industry standard:
Pin
Signal
1
Microphone -
2
Speaker -
3
S
4
Micr
ESD protection:
±
8kV air discharge TDMA noise reduction and EMC protection. Echo cancellation and noise
reduction is done in software by the Q26 module. This interface connects to the Q26 MIC2 and SPK2 signals.
MIC1 and SPK1 are not used.
1.2.5
USB console
The M2MBoxPro has a USB interface (labeled as console interface) that connects directly to the Q26 USB
interface. The M2MBoxPro acts as a USB slave device.
–
12Mbit/s full-speed transfer rate
–
3.3V type compatible
–
USB Soft connect feature
–
Download feature is not supported by USB
–
CDC 1.1 − ACM compliant
1.2.6
Power input
The M2MBoxPro takes DC voltage from 9VDC to 28VDC, and is protected against over and reverse voltage.
It also has a resettable fuse for increased protection.
Resettable fuse rating: 900mA
There are four ways to turn on the M2MBoxPro:
–
press the ON/OFF button for a short period of time
–
while the M2MBoxPro is switched off, apply a positive voltage on digital input 0 (this can be deactivated
using DIP switches)
–
while the M2MBoxPro is disconnected and has no battery, connect the mains and apply a voltage be-
tween 9V to 28V DC on the power supply input
–
use a Wavecom Q26 alarm
To turn off the M2MBoxPro, it is recommended to send the AT+CPOF command to the wireless processor.
This can be done either by serial port, either by openAT. Once the device is powered on, the ON/OFF button
can be sensed with Q26 GPIO4 signal. It is recommended that the openAT software polls this signal and send
a AT+CPOF command after ON/OFF button is pushed for more than 10 seconds.
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3603-9, 36/F., 118 Connaught Road West, Sheung Wan, Hong Kong
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