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6.2.4 GSM SMS Access code
Change the SMS Access code. The SMS Access code is used an authorisation code to allow the
Gateway to send SMS to the user. If the Access code in the SMS sent to the Gateway is incorrect the
Gateway will not answer the SMS.
6.2.5 Gain control
Gain control is used to amplify or attenuate the signals between the GSM network and the PHONE
line from the Gateway to the emergency alarm. The signal gain can be set on both GSM to POTS and
POTS to GSM. Please note that POTS is the analogue line PHONE generated by the GSM Gateway.
Changing the GSM to POTS (PHONE) to positive values will amplify the signal received on the GSM
transmitted to the PHONE. Changing to negative values will attenuate the signals to the PHONE.
Changing the POTS (PHONE) to GSM to positive values will amplify the signal received from the
PHONE transmitted to the GSM network. Changing to negative values will attenuate the signals to the
GSM network.
The signal gain and quality of the GSM system differs between countries and you may therefore be
required to change the signal gain to adjust for these differences. If the emergency alarm has trouble
receiving and deciphers DTMF sent by the receiver; try adjusting the GSM to POTS (PHONE). Start
by trying negative values, if the result does not improve; try positive values.
If the receiver has trouble receiving and deciphers DTMF sent by the emergency alarm; try adjusting
the POTS (PHONE) to GSM.
6.2.6 POTS1 power saving
Note: Do not use this feature for any emergency alarm systems. This feature can be used when
connecting the Gateway to a regular phone.
The power save will disconnect the PHONE line power during a pre-defined time. Operating modes
are "Off", "Always on" and "Battery only".
Battery only mode will enable the function only during battery operation to increase the battery
operation time.
After selecting operating mode; set:
Total cycle time – Cycle time for power save operation. E.g. select cycle time to 1 second; set the
Total cycle time (ms*10/steps) to 100 (=1000ms).
Power up time – Time of operation during the cycle time. E.g. if the cycle time is set to 1 second and
you want the Gateway to power the PHONE during 50% of the time; set the Power up time
(ms*10/steps) to 50 (=500ms).
6.2.7 Tone generation
The GSM Gateway can generate line tones on the PHONE line according to different country specific
preferences. There are a few pre-programmed countries:
France, Germany, Great Britain, Italy and Spain.
Germany and Italy are the same setting and this is also the EU recommendation for PSTN line tones.
When using the GSM Gateway with an emergency phone; please use German, Italian or Spanish
settings even if installed in other countries.
6.2.8 Battery failure signal – Dial tone battery alarm
The Gateway can signal a battery failure by signalling on the PHONE analogue line.
Setting the GSM Gateway to generate the Dial tone battery alarm, indicating a battery failure. When a
battery failure occurs the Gateway will send a congested tone instead of the normal continuous dial
162236M User Manual GSM Gateway
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