The GMC-1 is intended for acquisition and transmission of data, about of controllable object condition, through a cell-communication network to the server.

The GMC-1 includes:

•  the SIM900 system from GPRS module;
• processor;
• signals matching module;
• external GSM-antenna.

 

 The modular construction of the device and presence of the programmed processor allow using it in various systems of remote supervision and management.

The clock of a real time and reserve Li-Ion the accumulator, providing operation of controller at switching-off of an external feeding are built in the controller.

The device supports following interfaces: RS-485, RS-232, I²C, SPI, ONEWire.

Functional capabilities:

•  SMS sending and receiving;
• Data transmission and reception by GPRS;
• Reception and transmission of voice calls;
• Indication about of registration in the GSM network;
• Presence of dialing fixing number;
• Access implementation to SIM only through defined GSM network’s operator.

SPECIFICATIONS

Number of digital input/output	40
Number of analogue inputs (0…3V)	16
Supply voltage from constant-current source	6…40 V
Supply voltage from internal accumulator	3,7 V (1A per hour)
Current consumption at call waiting	30 mA
Current consumption at data transmission mode	300 mA
Operation time at feeding off-line mode, no more than
— at call waiting mode	33h
— at data transmission mode	3h
Current peak value	2 A
Digitization speed	500 ksps
Mobile class	B
GPRS standard	class 10

The RM-D provides transmission and reception of the digital information on the radio channel in UHF range.

The radio modem uses the external protocol of data exchange on RS-232 interface for data exchange.

Has the built-in specialized transceiver.

The indicator of receiving power that gives the opportunity to carry out adjustment of the antenna without special equipment is installed on the RM-D panel.

  The distance between information interchange points depends on type of antennas and length of the cables connecting the RM-D with antenna.

It is used in electrical power engineering; in meteo, gas, seismic services; water supply; at management of industrial devices.

The system of the communication and data exchange organization includes:
— digital radio modem………………………………….2 pcs.
— antenna………………………………………………… 2 pcs.
— cable connecting antenna with RM-D ………….2 pcs.

SPECIFICATION 

Central working frequency	(433±50ppm) MHz
Working frequency range	0…65 kHz
Supply voltage from direct current	12±2 V
Transmitter output power P-1dB, no less than	25…37 dBm
Digital flow velocity no more	2 kbaud
Type of digital information security	CRC 16
Sensitivity of receiver at BER 10-3, no more	minus 100 dBm
Communication	two-way alternate
Modulation	FSK
Output/ input signals type	ТTL
Galvanic isolation between output and input	5000 V
Overall dimensions	200–75–30 mm
Weight without antenna no more	750 g

Radio modems (RM) allows organizing communication between the computers and local networks (to create radio networks).

A high noise-stability and reliability of the transmitted information is ensured due to using of spread-spectrum communication systems and digital transfer of date with additional coding of information.

Modems have the opportunity of simultaneous phone communication.

It can be used as repeater with unlimited retransmission coefficient.

RM-s — separate device, joined  to any standard computer.

RM-s are intended for operation in a continuous (round-the-clock) mode of reception and transfer in field conditions, on stationary and mobile objects.

RM driver gives possibility to exploitation all known programs in NETWARE, WINDOWS 95, 98.

The follwing RM modifications are proposed:                               

Type	frequency  range
RM-300	237,5…262,5 MHz
RM-825-01	812,5…837,5 MHz
RM-825-02	800,0…850,0 MHz
RM-925-01	912,0…937,0 MHz
RM-925-02	900,0…950,0 MHz
RM-2500-01	2487,0…2512,0 MHz
RM-2500-02	2475,0…2525,0 MHz

It is intended for organization of few and multi channels transmission radio lines of; telephone, computer, video and audio information.

Features of the given equipment are:

• small dimensions and weight;
• low power consumption;
• sweeping time(15 min);
• mobility.

 

SPECIFICATIONS

 

Parameter	VHF	UHF	SHF	EHF
Max. power consumption	40 W	40 W	40 W	20 W
Output power of transmitter	5 W	5 W	200 mW	20 mW
Signal/noise ratio at input of receiver	minus 3 dB	minus 3 dB	20 dB	20 dB

Distance point-to-point	20 km
VSWR of antennas	1,4
Power supply	10…15 V
Operating mode	continuous
Operating temperature	minus 50…+450С
Relative humidity at T = 250C	80%

GSM gateway provides a direct connection of a corporate phone system with GSM network that cut down expensies charges on a mobile connection (usually in the companies) and gives the saving rate.

Two SIM cards of communication statements with as much as possible favorable tariff plan are installed in a GSM gateway. Wereupon the GSM gateway starts operate as mobile phone of GSM network connected to a stationary network. The network administrator includes in the list of telephone numbers of employees who should have access to the gateway. All stationary and mobile subscribers of such network can make out coming calls at the lower cost.
The GSM gateway has also PBX trunk.

For reception of GSM signal from the base station the external antenna is connected to a matching connector on the front panel of the gateway case.

It is possibly to connect 4 and more SIM cards on the customer’s request .

 

SPECIFICATIONS

Supply voltage	220V
Current at pick up	30mA
Voltage at hang up	48V
Power consumption, no more than	50 W
Other parameters of GSM gateway correspond to the GSM standards.