We
all are aware of the term GPRS (General Packet Radio Service) which
is basically a packet switching technology that enables device to
transfer data by connecting to the internet. Almost each phone is
enabled with GPRS, which connects to the internet. The use of GPRS is
making the daily life of people easier and perfect. We can get to
know about the whole world with the simple handheld devices.
But
have you ever imagined that GPRS can bring a kind of revolution in
the field of Biometrics Attendance System. With the help of GPRS, a
device can be installed in far flung areas without internet
connectivity. This can help those construction companies that work in
far off areas without a proper connection set-up.
Star
Link has designed a GPRS enabled biometric attendance machine keeping
in mind above quoted things to remove the problems faced by major
construction companies and other security service providing agencies.
The usage of GPRS enabled device will help to streamline the work
with ease and channelize the work force.
But
the major question arising in your mind would be: How it works? How
it is connected to the server? How it is beneficial for the user?
How
GPRS enabled devices are connected to the server?
The devices designed
and developed by Star Link India are GPRS enabled with a SIM card
slot. The SIM card used in these devices should be postpaid, or
prepaid with data pack. Then after inserting the SIM card, the
network is selected through the menu through the machine.
Then, PPP protocol
establishes the connection to the internet, as a result Public IP is
assigned to a device and the gateway. Server IP (Public Static IP of Server where Time Office is installed) is
configured which helps to connect to the server. Now connection
request is sent from the device. There are two possibilities for
outcome of connection requests, whether it will be rejected or
accepted. If the connection is not being established, then the
machine keeps on sending the request every 3 minutes. Then, after one
hour, even if it doesn't get connected, the device pings Google. If
google also doesn't work then, the device itself breaks the
connection and re-establishes the connection. And if Google responds
to its ping, then device keeps on sending the request every 3
minutes. This process continues until unless the connection is
established.
How
it works?
Once connection is
established, it sends the data to the server for further processing.
It also checks the server whether any finger management task is
pending or not like the addition of a user with a finger, configuration
related tasks (i.e. Machine password, Machine battery, voltage reading, etc.).
The
MOST
Important
Feature of GPRS
enabled devices from Star Link India:-
Even if the device
has lost its connection for a few days due to any reason or data pack
is over, then in that condition the device still works and stores the
data offline. As soon as it gets connected to the server, it sends
the complete data which it has stored for the last few days. It may
work without any connection for even months, as it will store the
data offline.
User can also check
the balance data in the SIM card using USSD codes through the keypad
on the machine. Also, machine firmware updates can be done on the air
from the server itself. And, almost 500 GPRS enabled devices can be
connected to the server for the same purpose.
So do consider Star
Link's GPRS enabled device for attendance management system from far
off areas.
No comments:
Post a Comment