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 TECHNICAL REFERENCE AND USER’S GUIDE  

REV A

 GSM GATEWAY

9

INSTALLATION

Since GT20 and GT10 are structurally completely the same and only the number of 
channels is different, the installation information below has been given for GT20. 
Installation of GT10 can be carried out similarly by making use of that information for 
only one channel easily.

PREPARATION

Before starting with the installation of the gateway, the location where the installation 
will be performed should be determined according to the criteria below: 

1-   The wall on which the GT20 GSM Gateway will be mounted should be firm enough 
 

to carry the anchor plugs and it should have a smooth surface. 

2-   It should be installed in places that are not exposed to direct sunlight with humidity 
 

rate in the range %0-%80, with environmental temperature in the range 0-45°C, 

 

well ventilated, well lit. It should not be exposed to effects of dust, vibration, oil and 

 

water.              

3-   Devices that generate high frequency waves (such as welding machines, office 
 

equipment such as computers and telex machines, air conditioners, TV sets, etc.) 

 

should not be in the same room if possible, and they should be at least 3 meters 

 

away from the gateway, otherwise.   

4-   A location with powerful GSM coverage should be chosen. As single line telephones 
 

or telephone systems may be affected by the signal level of the GSM gateway, it is 

 

recommended to select a place for GT20/10 far away from these equipments.

5-   The mains supply should be reserved for the module only. The power supply of the 
 

system should be uninterrupted and, if possible, the system should be powered 

 

from an independent source from which no other device is powered. 

 POWER SUPPLY THAT IS INTERRUPTED FREQUENTLY MAY AFFECT 

NORMAL OPERATION OF THE SYSTEM!

6-   A location that can be reached easily should be chosen, considering the mounting 
 

work and later maintenance work.

7-   There should be an outlet 2 meters away for the adaptor. 
8-   It is recommended that the lower edge of the module should be 150 cm. above 
 the 

floor. 

APPLICATION

In order to mount the GT20 GSM Gateway on the wall, the front cover of the gateway 
should be removed. In order to open the front cover, one should split the front cover from 
the back one by pressing the latches at both sides of it. (Figure - 6). 

 

 

 

 

 

     Figure-6  

 

 

 

        

After the cover of the module has been opened, the wall mounting can begin. At this 
stage, the steps below should be followed.
Normally, it is not necessary to remove the card from the cabinet for the installation. 
But if required for any reason, the card can be removed by following the steps in Figure 
- 7. Push the latch as “1”, then move the card in direction “2” and remove the card in 
direction “3”.
 

 

 

 

 

 

 

 

 

 

 

 

 

 

           

Figure-7

10

Summary of Contents for GT20

Page 1: ...01 2003 G T 20 GT 20 GT 10 TECHNICAL REFERENCE AND USER S GUIDE GSM GATEWAY...

Page 2: ...TECHNICAL REFERENCE AND USER S GUIDE REV A GSM GATEWAY...

Page 3: ...mployed signal levels for both of them should be checked Since frequently interrupted mains supply would affect normal operation of the system take care in making the power connection of the system sp...

Page 4: ...pared in order to present detailed technical information to people who need hardware based information about the GT20 and GT10 GSM Gateways information about installation of the gateway settings that...

Page 5: ...the exchange in Caller ID format upon wish GT20 GT10 has a structure that enables it to generate Caller ID information both in ETSI and Bellcore standards and in FSK format The selection between these...

Page 6: ...s and auxiliary circuits See the figure below for circuit locations S1 SIM slot for GSM module 1 G1 GSM module 1 A1 Analog extension for GSM module 1 C Computer interface reserved for future use L LED...

Page 7: ...cation is established with the GSM module the module is reset and the required parameters are loaded Start up state Even though the signal is above a certain level the channel may be in No network sta...

Page 8: ...ECIFICATIONS Parameter is needed confirmation tone 150 ms 500 Hz It is heard when a parameters needed to be entered or a correct programming action has been taken during programming Error tone 600 ms...

Page 9: ...uld be chosen As single line telephones or telephone systems may be affected by the signal level of the GSM gateway it is recommended to select a place for GT20 10 far away from these equipments 5 The...

Page 10: ...right left direction and then the gateway is fixed to the wall by tightening the lower screw Figure 10 7 Cover of the module is replaced after the SIM cards have been placed and connections of the el...

Page 11: ...sing the button shown as A the SIM cover shown as B is removed The SIM card is placed properly on the panel shown as C The cover B is pushed in place to finalize the installation If the mains voltage...

Page 12: ...lained above If the site has a clean and smooth surface the paper at the back of the holder is removed and the holders are sticked on the surface If the surface is dusty and shaggy rough plaster woode...

Page 13: ...SM Module Out Of Programming Mode The module must be taken out of the programming mode in order to terminate programming and storing new parameter values into the memory Automatic PIN Code Entry Thank...

Page 14: ...he Caller ID information for the call coming over the GSM module to the exchange or telephone over the analog line Parameters P 0 Caller ID transmission is not on line 1 Caller ID transmission is on l...

Page 15: ...se a number from the GT20 GT10 memory this program can be used Parameters P 01 64 Phone book index 842 P 843 P N 844 P Incoming Voice Level The incoming voice level can be adjusted for the calls made...

Page 16: ...nswer This program stores the number to which the unanswered calls coming over the GSM module on GT20 GT10 are forwarded Parameters P Telephone number with at most 16 digits Notes If the number of dig...

Page 17: ...to make an external line call By this way since the calls are made over the GSM modules on GT20 call tolls will be much less than the calls made over normal lines On the other hand when the LCR featur...

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