Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 89)

Chapter 10 – Supplementary Services Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 89
Supplementary Service Notifications +CSSN
Description: This command refers to supplementary service related network initiated notifications.
Values: Parameter sets/shows the +CSSI result code presentation status
0 disable
1 enable
Parameter sets/shows the +CSSU result code presentation status
0 disable
1 enable
0 unconditional call forwarding is active
1 some of the conditional call forwardings are active
4 closed User Group call, with CUG
5 outgoing calls are barred
6 incoming calls are barred
7 CLIR suppression rejected
0 this is a forwarded call (MT call setup)
1 closed User Group call, with CUG
2 call has been put on hold (during a voice call, & fields may be present)
3 call has been retrieved (during a voice call, & fields may be present)
4 multiparty call entered (during a voice call, & fields may be present)
5 call on hold has been released (during a voice call)
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 (during a
voice call, & fields may be present)
Closed User Group index
String type phone number
Type
of address
Syntax: Command syntax: AT+CSSN= ,
When =1 and a supplementary service notification is received after a mobile
originated call setup, intermediate result code
+CSSI:[,] is sent
before any other MO call setup result codes.
When =1 and a supplementary service notification is received during a call,
unsolicited result code
+CSSU:[,[,,]] is sent.