AT Commands Reference Guide
80529ST10815A Rev.2– 2017-09-14
ReproductionforbiddenwithoutTelitCommunicationsS.p.A.writtenauthorization‐AllRightsReserved page22of233
Command Response Time-Out
Every command issued to the Telit modules return 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 for which the 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”).
Command Estimated maximum time to get response (Seconds)
+COPS
125 (test command)
+CLCK
15 (SS operation)
5 (FDN enabling/disabling)
+CPWD
15 (SS operation)
5 (PIN modification)
+CPIN
30
+CSCA
5 (read and set commands)
+CSAS
5
+CMGS
120 after CTRL-Z; 1 to get ‘>’ prompt
+CMGW
5 after CTRL-Z; 1 to get ‘>’ prompt
+CMGD
5 (single SMS cancellation)
25 (cancellation of 50 SMS)
+CMGR
5
+CMGL
100
+CGACT
150
+CGATT
140
D
120 (voice call)
Timeout set with ATS7 (data call)
+COPN
10
+CRSM
180