> 9.13 | AT+CSSN Supplementary service notifications

> Syntax

> Test Command AT+CSSN=?
> Response(s)
> +CSSN: (list of supported<n>s), (list of supported<m>s)
> OK

> Read Command AT+CSSN?
> Response(s)
> +CSSN: <n>, <m>
> OK

> Write Command AT+CSSN=<n>[, <m>]
> Response(s)
> OK
> ERROR
> +CME ERROR

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> GSM 07.07 |  | - |  | + | + | + | + | + | + |  |  | - | - | -

> Unsolicited Result Codes
> URC 1
> +CSSI: <code 1>
> When <n>=1 and a supplementary service notification is received after a mobile originated call setup, intermediate result code "+CSSI: <code 1>" is sent to TE before any other MO call setup result codes
> URC 2
> +CSSU: <code 2>
> When <m>=1 and a supplementary service notification is received during a mobile terminated call setup or during a call, unsolicited result code "+CSSU: <code 2>" is sent to TE.
> Command Description
> The write command enables or disables the presentation of URCs for supplementary services.
> Parameter Description

> <n>(num)

> 0(&F)
> Suppress "+CSSI" URCs
> 1
> Activate "+CSSI" URCs

> <m>(num)

> 0(&F)
> Suppress "+CSSU" URCs
> 1
> Activate "+CSSU" URCs

> <code 1>(num)

> 0
> unconditional call forwarding is active
> 1
> some of the conditional call forwardings are active
> 2
> call has been forwarded
> 3
> Waiting call is pending

> <code 2>(num)

> 0
> The incoming call is a forwarded call.
> 5
> Held call was terminated by other party
> 10
> additional incoming call forwarded
> Note

> • | URCs will be displayed only if the call concerned is a voice call, but some URCs will be displayed as well as for data calls (like "+CSSU"=0).