Mode Modify
14 Mode Modify
The "Mode Modify" procedure is used by BSC to request a change of
the channel mode (speech-to-data, data-to-speech, etc.) of an active
channel.
14.1 References
/GSM 05.02/ GSM 05.02 (phase2) version 4.3.0
/GSM 08.58/ GSM 08.58 (phase2) version 4.2.0
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
14.2 Function
By means of the MODE MODIFY procedure /GSM: 08.58:4.2./ BSC
orders RBS to change channel mode of an active dedicated channel
group.
Supported channel combinations /GSM:05.02:6.4/:
• (i) TCH/F + FACCH/F + SACCH/TF
• (ii) TCH/H(0,1) + FACCH/H(0,1) + SACCH/TH(0,1).
RBS actions:
• Interpretation of MODE_MODIFY message from BSC
• Channel Mode Modification
The function is initiated when a MODE_MODIFY message /
GSM:08.58:8.4.9/, is received from BSC. Any transition between the
following full rate channel modes /GSM:08.58:9.3.6/ is supported:
TCH/F Signalling
TCH/FS Full rate speech
TCH/F9.6 NT Full rate data 9.6kbit/s non-transparent
TCH/F9.6 Full rate data 9.6kbit/s transparent
TCH/F4.8 Full rate data 4.8kbit/s transparent
TCH/F2.4 Full rate data 2.4kbit/s transparent
TCH/F2.4 Full rate data 1.2kbit/s transparent
TCH/F2.4 Full rate data 1200/75 bit/s transparent
TCH/F2.4 Full rate data 600bit/s transparent
Any transition between the following half rate Channel Modes /IWD
TRAFFIC/ are supported:
TCH/H Signalling
TCH/HS Half rate speech
TCH/H4.8 NT Half rate data 4.8kbit/s non-transparent
EN/LZT 123 2697 R5A
1998-08-13
113 (306)
© Ericsson Radio Systems AB
— All Rights Reserved —
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