SIM5300E AT Command Manual V1.02 
+CLPORT: 6,<TCP port>,<UDP port> 
+CLPORT: 7,<TCP port>,<UDP port> 
 
OK 
Write Command 
1) For single IP connection 
(+CIPMUX=0) 
AT+CLPORT=<mode>,<port> 
2) For multi IP connection 
(+CIPMUX=1) 
AT+CLPORT=<n>,<mode>,<port> 
Response 
OK 
 
If error is related to ME functionality: 
+CME ERROR: <err> 
Parameters  <n> 
0..7 
A numeric parameter which indicates the connection 
  number this used in multi IP connection 
 
<mode> A string parameter which indicates the connection type 
"TCP"  TCP local port 
"UDP"  UDP local port 
 
<port>0-65535 
A numeric parameter which indicates the local port 0 is 
the default value, a port can be dynamically allocated a port. 
Reference  Note: 
This command will be effective when module is set as a Client 
7.2.9  AT+CSTT    Start Task and Set APN, USER NAME, PASSWORD 
AT+CSTT Start Task and Set APN, USER NAME, PASSWORD 
Test Command 
AT+CSTT=? 
Response 
+CSTT: "APN","USER","PWD" 
 
OK 
Read Command 
AT+CSTT? 
Response 
+CSTT: <apn>,<user name>,<password> 
 
OK 
Write Command 
AT+CSTT=<apn>,<user 
name>,<password> 
Response 
OK 
 
If error is related to ME functionality: 
+CME ERROR: <err>