Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
3
7
Release 6
6.18 HSCSD non-transparent asymmetry configuration +CHSA
Table 25: +CHSA parameter command syntax
Command
Possible response(s)
+CHSA=<mode>
+CHSA?
+CHSA: <mode>
+CHSA=?
+CHSA: (list of supported <mode>s)
Description
Set command controls the preferred asymmetry bias for non-transparent ECSD calls. Downlink biased asymmetry
means that 8-PSK modulation is preferred downlink and GMSK modulation uplink. Uplink based asymmetry means
that 8-PSK modulation is preferred uplink and GMSK downlink. Changing of <mode> affects the current call only if
<topRx> (refer +CHSN) was non-zero when call was established.
Test command returns values supported by the MT/TA as compound values. The <mode> subparameter range
indirectly indicates the UE Type; range (0-1) indicates UE Type A and range (0-2) indicates UE Type B.
NOTE1: ECSD is also controlled by +CHSD, +CHSN and +CHST.
NOTE2: This command is only applicable in GERAN.
Defined values
<mode>:
0 No preference
1 Downlink biased asymmetry
2
Up
link biased asymmetry
Implementation
Mandatory when non-transparent ECSD is implemented.
This command is not applicable to UTRAN single mode UE.
6.19 Single numbering scheme +CSNS
Table 1: +CSNS parameter command syntax
Command
Possible response(s)
+CSNS=[<mode>]
+CSNS?
+CSNS: <mode>
+CSNS=?
+CSNS: (list of supported <mode>s)
Description
Set command selects the bearer or teleservice to be used when mobile terminated single numbering scheme call is
established. Parameter values set with +CBST command shall be used when <mode> equals to a data service.
Test command returns values supported as compound values.
Defined values
<mode>:
0
voice
1 alternating voice/fax, voice first (TS 61)