Specifications
SIM900 AT Command Manual       
SIM900_AT Command Manual_V1.03  185  12/24/2010 
Parameters 
See Write Command 
Response 
OK 
ERROR 
Write Command 
AT+CIPSERVE
R=<mode>[,<por
t>] 
Parameters 
<mode>  0 close server 
  1 open server 
<port> 1..65535 Listening port 
<channel id> channel id 
<bearer> GPRS bearer 
Reference 
Note 
This command is allowed to establish a TCP server only when the state is IP 
INITIAL or IP STATUS when it is in single state. In multi-IP state, the 
state is in IP STATUS only. 
8.2.19 AT+CIPCSGP Set CSD or GPRS for Connection Mode 
AT+CIPCSGP Set CSD or GPRS for Connection Mode 
Response 
+CIPCSGP:0-CSD,DIALNUMBER,USER 
NAME,PASSWORD,RATE(0-3) 
+CIPCSGP: 1-GPRS,APN,USER NAME,PASSWORD 
OK 
Test Command 
AT+CIPCSGP=? 
Parameters 
See Write Command 
Response 
+CIPCSGP: <mode>, <apn>, <user name>, <password>[,<rate>] 
OK 
Read Command 
AT+CIPCSGP? 
Parameters 
See Write Command 
Response 
OK 
ERROR 
Write Command 
AT+CIPCSGP=
<mode>,[(<apn>,
<user name>, 
<password>),(<d
Parameters 










