Rainbow Electronics GM862-QUAD-PY - Manual (Page 102)

AT Commands Reference Guide
80000ST10025a Rev. 5 - 09/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 102 of 434
+CHLD - Call Holding Services SELINT 2
1 - releases all active calls (if any exist), and accepts the other (held or
waiting) call
1X - releases a specific active call X
2 - places all active calls (if any exist) on hold and accepts the other (held
or waiting) call.
2X - places all active calls on hold except call X with which
communication shall be supported (only from version D).
3 - adds an held call to the conversation
4 - connects the two calls and disconnects the subscriber from both calls
(Explicit Call Transfer (ECT))
Note: "X" is the numbering (starting with 1) of the call given by the sequence
of setting up or receiving the calls (active, held or waiting) as seen by the
served subscriber. Calls hold their number until they are released. New calls
take the lowest available number.
Note: where both a held and a waiting call exist, the above procedures
apply to the waiting call (i.e. not to the held call) in conflicting situation.
AT+CHLD=? Test command returns the list of supported <n>s.
+CHLD: (0,1,1X,2,2X,3,4)
Reference GSM 07.07
Note ONLY for VOICE calls
3.5.4.3.13 Unstructured Supplementary Service Data - +CUSD
+CUSD - Unstructured Supplementary Service Data SELINT 0 / 1
AT+CUSD[=
[<n>[,<str>
[,<dcs>]]]]
Set command allows control of the Unstructured Supplementary Service
Data (USSD [GSM 02.90]).
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
<str> - USSD-string (when <str> parameter is not given, network is not
interrogated)
- If <dcs> indicates that GSM338 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> - GSM 3.38 Cell Broadcast Data Coding Scheme in integer format
(default is 0).