User Manual

In the next paragraphs the following notations are used:
<cr> represents the Carriage Return Character (13)
<lf> represents the Line Feed Character (10)
<xx> represents a parameter with changing name is in place of the double x. (< and >
characters are only for limiting the parameter and must not be issued to the terminal).
[<xx>] represents an optional parameter whatever name is in place of the xx.
[ and ] characters are only for limiting the optional parameter and must not be issued to the
terminal).
Every command issued to the Telit modules returns a result response if response codes are
enabled (default). The time needed to process the given command and return the response
varies, depending on the command type. Commands that do not interact with the SIM or the
network, and involve only internal set up settings or readings, have an immediate response,
depending on SIM configuration(e.g., number of contacts stored in the phonebook, number of
stored SMS), or on the network the command may interact with.
In the table below are listed only the commands whose interaction with the SIM or the
network could lead to long response timings. When not otherwise specified, timing is referred
to set command. For phonebook and SMS writing and reading related commands, timing is
referred to commands issued after phonebook sorting is completed. For DTMF sending and
dialing commands timing is referred to module registered on network (“AT+CREG?” answer
is “+CREG: 0,1” or “+CREG: 0,5”).
+COPS
125 (test command)
+CLCK
15 (SS operation)
5 (FDN enabling/disabling)
+CPWD
15 (SS operation)
5 (PIN modification)
+CLIP
15 (read command)
+CLIR
15 (read command)
+CCFC
15
In case no response is received after the timeout time has been elapsed, then try repeating the
last command and if still no response is received until the timeout time, an Unconditional
Shutdown MUST be issued and the device must be powered ON again.