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IT-2000
IT-2000
TELEPHONE GSM INTERFACE
TECHNICAL MANUAL
(ENGLISH)
DESCRIPTION
The IT-2000 GSM interface simulates a traditional telephone line (PSTN) using a GSM system module.
It can be used as telephone backup system when a PSTN line is out of order or is not available: in these
conditions, or if the interface is properly configured, a call from an external unit is forwarded through the
GSM network. Besides, in the previous conditions, an incoming call from GSM network, generates a ring for
the external unit.
The system is completely transparent to SIA FSK and CONTACT ID protocols signals; it also provides sy-
stem status and lifetest O.C. outputs .
Using SMS commands IT-2000 can be remotely configured and can generate system informations.
AUTOMATIC SMS MESSAGES
IT-2000 handles incoming and outgoing SMS messages.
Incoming messages are used to configure the system.
Outgoing messages can be answers to commands or the following event-generated (if enabled) messa-
ges:
ID
Default Text
1
Description
1
LIFE TEST
Programmable life test:
sent periodically according to the configu-
ration
2
LOW BATTERY
Battery fail
(the battery status is tested every 15 minutes)
3
GSM NO LINE
GSM fail:
this message is sent as soon as the GSM network becomes
available after a programmable out of service time
4
PSTN FAILURE
PSTN line FAIL: i
f the PSTN line is not available this message must
be disabled
5
“Sender
ID”:received
text
2
SMS echo function:
this function forwards each incoming not reco-
gnized SMS (e.g.: SIM card expiry, credit exhaustion, etc.)
6
GSM:OK LEV :3
PSTN:FAIL
BATT:OK
After detecting a ring from the GSM network, the system checks if the
calling telephone number belongs to the adrress book and, if yes, it
answers with a message containing the system status.
This message doesn’t need to be associated to a specific telephone
number of the address book.
1) The text of the first 4 messages can be changed
2) The echo function returns the message received by the system preceeded by the sender id.
This function also allows to monitor improper access attempts
A SMS message is sent if the relevant event occurs and if it has been previously associated at least to a
telephone number (8 telephone numbers may be stored in the system): by default, all messages are asso-
ciated to the first telephone number of the address book.
COMPLIANT
EN 50136-1-1 EN 50136-2-1+A1
ATS 2
