Standard Horizon GM29 manual Hscsd Non Transparent Call Configuration, At+Chsn?, At+Chsn=?

7. DATA - HSCSD

7.3 AT+CHSN	HSCSD Non Transparent Call Configuration
	Description	Command	Possible Responses
	Set HSCSD	AT+CHSN=[<wAiur>	•	+CME ERROR: <err>
	configuration. This	[,<wRx>[,<topRx>	•	OK
	command is also used	[,<codings>]]]]	• ERROR
	during a call if new
	<wAiur> and/or <wRx>
	are/is desired
	Show current non-	AT+CHSN?	•	+CHSN: <wAiur>,
	transparent HSCSD			<wRx>, <topRx>,
	setting			<codings>
			• +CME ERROR: <err>
			• OK
			• ERROR
	Test if command is	AT+CHSN=?	•	+CHSN: (list of
	supported and show			supported <wAiur>s),
	parameter ranges			(list of supported
				<wRx>s), (list of
				supported <topRx>s),
				(list of supported
				<codings>s)

• +CME ERROR: <err>

• OK

• ERROR

Controls parameters for non-transparent HSCSD calls. Changing <topRx> or <codings> during a call does not affect the current call. Changing <wAiur> or <wRx> affects the current call only if <topRx> was non-zero when the call was established. When using the command in this way it comes in the “action” command category. This is what is referred to as user initiated up- and down-grading in GSM 02.34 and GSM 03.34.

Note! Recommended value for parameter <speed> in AT+CBST is 0.

<wAiur>	Description
0	TA/ME shall calculate a proper number of receive
	timeslots from currently selected fixed network user rate
	(<speed> parameter from +CBST command, and
	<codings>, and <wRx> (or <maxRx> from +CHSD
	command if <wRx>=0)
1	Wanted air interface user rate is 9.6kbit/s
2	Wanted air interface user rate is 14.4kbit/s
3	Wanted air interface user rate is 19.2kbit/s
4	Wanted air interface user rate is 28.8kbit/s

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