Manual
     Smart Machine Smart Decision 
SIM800 Series_AT Command Manual_V1.09  110  2015-08-03 
+CSSN: <n>,<m> 
OK 
AT+CSSN? 
Parameters 
See Write Command 
Response 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Write Command 
AT+CSSN=<n>[,
<m>] 
Parameters 
<n> A numeric parameter which indicates whether to show the 
+CSSI:<code1>[,<index>] result code presentation status after a mobile 
originated call setup 
 0 disable 
1 enable 
<m> A numeric parameter which indicates whether to show the 
+CSSU: <code2> result code presentation status during a mobile 
terminated call setup or during a call, or when a forward check 
supplementary service notification is received. 
0 disable 
1 enable 
<code1>  0  Unconditional call forwarding is active 
 1 Some of the conditional call forwarding are active 
 2 Call has been forwarded 
 3 Call is waiting 
 4 This is a CUG call (also <index> present) 
 5 Outgoing calls are barred 
 6 Incoming calls are barred 
 7 CLIR suppression rejected 
<index> Closed user group index 
<code2> 0 This is a forwarded call 
 1 This is a CUG call (also <index> present) (MT call 
setup) 
 2 Call has been put on hold (during a voice call) 
 3 Call has been retrieved (during a voice call) 
 4 Multiparty call entered (during a voice call) 
 5 Call on hold has been released (this is not a SS 
notification) (during a voice call) 
 6 Forward check SS message received (can be received 
whenever) 
 7 Call is being connected (alerting) with the remote party 
in alerting state in explicit call transfer operation (during a voice call) 
 8 Call has been connected with the other remote party in 
explicit call transfer operation (also number and subaddress parameters 










