Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
3
3
Release 6
6.12 HSCSD device parameters +CHSD
Table 19: +CHSD action command syntax
Command
Possible response(s)
+CHSD
+CHSD: <mclass>,<maxRx>,<maxTx>,<sum>,<codings>
+CME ERROR: <err>
+CHSD=?
Description
Execution command returns information about HSCSD features (refer 3GPP TS 22.034 [29]) supported by the MT/TA.
Refer subclause 9.2 for possible <err> values.
The return information is only applicable in GERAN.
Defined values
<mclass>: integer type; multislot class
<maxRx>: integer type; maximum number of receive timeslots that MT can use
<maxTx>: integer type; maximum number of transmit timeslots that MT can use
<sum>: integer type; total number of receive and transmit timeslots that MT can use at the same time (per TDMA
frame). The following applies in a HSCSD call: 1 ≤ (receive slots) + (transmit slots) ≤ <sum>
<codings> is a sum of integers each representing a supported channel coding (e.g. value 5 indicates that 4,8k and
9,6k channel codings are supported):
1 4,8k full rate data traffic channel
4 9,6k full rate data traffic channel
8 14,4k full rate data traffic channel
16 28,8k full rate data traffic channel (only possible when 14.4k is supported)
32 32,0k full rate data traffic channel (only possible in a two-timeslot configuration)
64 43,2k full rate data traffic channel (only possible when 14.4k is supported)
Implementation
Mandatory when HSCSD implemented.
This command is not applicable to UTRAN single mode UE.
6.13 HSCSD transparent call configuration +CHST
Table 20: +CHST parameter command syntax
Command
Possible response(s)
+CHST=[<wRx>[,<codings>]]
+CHST?
+CHST: <wRx>,<codings>
+CHST=?
Description