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BRANCHES

: NOIDA - 0120-2549090, 2549095, 2541427, 2541437 | KOLKATTA - 033-22176549,  22169301 | 

AHMEDABAD - 079-40062001, 40062002 | MUMBAI - 022-24916940, 24916942 | VIZAG - 0891-2550725, 
2564752,2508088 | BANGALORE - 080-25598811,  25550729,  25591457 | CHENNAI - 044-24797950, 24797960 | 
KERALA - 94471-37717

Linkwell Telesystems Pvt. Ltd. 

1-11-252/1/A, Gowra Klassic, Begumpet, Hyderabad - 500 016. Andhra Pradesh, INDIA. 
Ph. : +91-40-66388000 | Fax : +91-40-66388006, 27763838

Product Pictures

WARRANTY 

VISIONTEK GSM Modem 81GR is warranted for a period of 12 months from the date of sale against 

manufacturing defects. Linkwell Telesystems Pvt. Ltd., obligation under this warranty shall be limited to 
servicing or replacing the defective parts provided that notice of such defects and satisfactory proof 
thereof is given to Linkwell Telesystems Pvt. Ltd.

The warranty does not cover any defect in the product caused by accident, misuse, mishandling, 
negligence, alteration, modification or substitution of any of the components or parts or any attempt at 
internal adjustments, any form of tampering by unauthorized/unskilled service personnel, loss of 
components or accessories, natural calamities and over voltage of electricity.

Under no circumstance shall Linkwell Telesystems Pvt. Ltd., be liable for any consequential or resulting 
injury or for loss, damage or expenses directly or indirectly arising from the use of this product Linkwell 
Telesystems Pvt. Ltd. will make every effort to carry out repairs/replacement under this warranty as early 

as possible and it is expressly made clear that the company shall not be liable to do so within any 

specified time or period.

The decision of Linkwell Telesystems Pvt. Ltd. as to the nature of the defect and applicability of this 

warranty shall be final. Claims if any, to this warranty shall be only made before the courts having 

jurisdiction in Secunderabad, Andhra Pradesh.

5

RS232 Port

GSM Antenna

Summary of Contents for 81GR

Page 1: ...p you in knowing all the features of the system including installation Operational and programming procedure in a step by step manner Please keep this handy manual handy for easy reference For Servicing and other details kindly look at the corporate address and email id at the backside of the manual 1 2 3 Introduction Installation Operation Rev 1 1 ...

Page 2: ...00 9600 bps programmable via a laptop or PC Wide supply voltage ranges 63 5V to 370V AC RS 232 interface Short Message Service and data compatible n n n n 1 Introduction 81GR GSM Unit 1 No 2 5dB Rubber Antenna 1No Fixing Clamps 02 Nos User Manual 1 No VISIONTEK GSM Modem 81GR package consists of the following The installation of 81GR is very simple Please follow the step by step procedure as shown...

Page 3: ...as Modem PC side settings Modem connected to COM1 a b Enter any name of the terminal c Select Proper COM Port d Select Modem Serial Port settings e Now the HyperTerminal is ready to Accept AT commands Select START Programs Accessories Communications HyperTerminal Note All the setting are for standard 9600bps SIM Card Installation Procedure Step 1 Open the screws on the rear side of the unit ...

Page 4: ...3 Select which Comport are Configured in the Modem Select and Click OK Select the Port setting with Baud Rate 9600 and click OK In the Connection Description Dialog Box type a name and Click OK ...

Page 5: ...PC to which we are dialing i To disconnect the modem Enter and ATH command If OK response is seen then modem is disconnected Baud Rate Change Settings a Connect the modem to PC serial port b Open the Hyper terminal with proper settings as shown above and type AT IDR required baud rate Enter c In Hyper terminal menu call shows disconnected d Now go to File Properties Configuration Select baud rate ...

Page 6: ...n the product caused by accident misuse mishandling negligence alteration modification or substitution of any of the components or parts or any attempt at internal adjustments any form of tampering by unauthorized unskilled service personnel loss of components or accessories natural calamities and over voltage of electricity Under no circumstance shall LinkwellTelesystems Pvt Ltd be liable for any...

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