Specifications

UC864-E/G AT Commands Reference Guide

80304ST10041a Rev. 3 - 18/07/08

+CHLD - Call Holding Services

Note ONLY for VOICE calls

3.5.4.3.13 Unstructured Supplementary Service Data - +CUSD

+CUSD - Unstructured Supplementary Service Data

AT+CUSD=

[<n>[,<str>

[,<dcs>]]]

Set command allows control of the Unstructured Supplementary Service

Data (USSD [3GPP TS 02.90/22.090]).

Parameters:

<n> - is used to disable/enable the presentation of an unsolicited result

code.

0 - disable the result code presentation in the DTA

1 - enable the result code presentation in the DTA

2 - cancel an ongoing USSD session (not applicable to read command

response)

<str> - USSD-string (when <str> parameter is not given, network is not

interrogated)

- If <dcs> indicates that 3GPP TS 3.38/23.038 default alphabet is used

ME/TA converts GSM alphabet into current TE character set (see

+CSCS).

- If <dcs> indicates that 8-bit data coding scheme is used: ME/TA

converts each 8-bit octet into two IRA character long hexadecimal

number; e.g. octet with integer value 42 is presented to TE as two

characters 2A (IRA 50 and 65).

<dcs> - 3GPP TS 3.38/23.038 Cell Broadcast Data Coding Scheme in

integer format (default is 0).

Note: the unsolicited result code enabled by parameter <n> is in the

format:

+CUSD: <m>[,<str>,<dcs>] to the TE

where:

<m>:

0 - no further user action required (network initiated USSD-Notify, or no

further information needed after mobile initiated operation).

1 - further user action required (network initiated USSD-Request, or

further information needed after mobile initiated operation)

2 - USSD terminated by the network

3 - other local client has responded

4 - operation not supported

5 - network time out

AT+CUSD? Read command reports the current value of the parameter <n>

AT+CUSD=? Test command reports the supported values for the parameter <n>

Reference 3GPP TS 27.007