GSM T
ELEMETRY
S
YSTEM
250
User Manual
1. Definitions....................................................................................2
2. SIM card .......................................................................................3
3. Input and output circuits ............................................................3
4. Output Relays ..............................................................................4
5. Power up ......................................................................................4
6. Power Loss ..................................................................................4
7. User Set-Up of 250 ......................................................................4
8. User Set-Up Commands .............................................................5
9. Control Commands .....................................................................7
10.
11.
Messages generated by the unit.............................................9
Technical Specifications .......................................................10
1. Definitions
The following definitions are used throughout this document and generally in connection with the control unit.
Message
An SMS (‘text’) message sent from one mobile station to another.
~
Denotes a ‘space’ in the format of a message.
Alphanumeric.
Characters in the range A to Z (upper and lower case), numbers in the range 0 – 9.
Mobile.
A mobile telephone that is used to send and receive SMS messages.
DS250-5 Nov ’06
©2006
REG No 277 4001, ENGLAND.
Page 2
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