Installation And Connection - Maxcom MM28D HS User Manual

TECHNOLOGY PARAMETER
 Environment Temperature: -10℃～+45℃
 Relative Humidity: 10％～95％
 Atmospheric Pressure: 86～106Kpa
 Working Frequency: E-GSM 900/1800 or 850/1900 (option)
 Working Power: AC220V, 50Hz, DC 5V 1000mA
 Backup Battery: Rechargeable battery Ni-MH AAA 3.6V600mAh
 Standby Time: around 5 days
 Talk Time: About 2 hrs
NOTE:
The standby time and talk time are also depending on the local network and the battery use.

INSTALLATION AND CONNECTION

Battery installation
The unit requires rechargeable battery. Open the battery compartment cover and insert the
batteries in the right polarity, then close the cover. Also you can connect to the DC adaptor to
supply power.
SIM card Installation
NOTE:
 Make sure to turn off the phone before inserting or taking out the SIM card. Completely
forbid to insert or take out SIM card when the phone is connected to the external power
supply or the SIM card may be damaged.
 Do not touch the metal plate area of the SIM card in order to avoid losing or damaging the
messages in the card and put the card far away from the electromagnetism. If the card is
damaged, the phone can not enter into the GSM network.
Adapter connection
5