10 supplementary service notifications +cssn, 1 description, 2 syntax – Rainbow Electronics 900 User Manual
Page 100: 3 defined values, 10 supplementary, Service notifications +cssn

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4: incoming (MT call)
5: waiting (MT call)
<mode> (teleservice) :
0 : voice
1: data
9: unknown
<mpty> (multiparty)
0: call is not one of multiparty (conference) call parties
1: call is one of multiparty (conference) call parties
<number>
string type phone number in format specified by <type>
<type>
type of address byte in integer format
<alpha>
optional string type alphanumeric representation of <number>, corresponding to the entry
found in phonebook. (for UCS2 format see commands examples +CLIP, +CCWA or +COLP)
10.10 Supplementary service notifications +CSSN
10.10.1 Description:
This command refers to supplementary service related network initiated notifications.
10.10.2 Syntax:
Command syntax: AT+CSSN= <n>, <m>
When <n>=1 and a supplementary service notification is received after a mobile originated call setup,
intermediate result code +CSSI:<code1>[,<index>] is sent before any other MO call setup result codes.
When <m>=1 and a supplementary service notification is received during a call, unsolicited result code
+CSSU:<code2>[,<index>[,<number>,<type>]] is sent.
Command
Possible responses
AT+CSSN?
+CSSN: 0,0
OK
10.10.3 Defined values
<n> (parameter sets/shows the +CSSI result code presentation status) :
0: disable
1: enable
<m> (parameter sets/shows the +CSSU result code presentation status) :
0: disable
1: enable