Mode Modify - Ericsson CME 20 R6.1 Reference Manual

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 08.58/
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/:
•
•
RBS actions:
•
•
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
TCH/FS
TCH/F9.6 NT
TCH/F9.6
TCH/F4.8
TCH/F2.4
TCH/F2.4
TCH/F2.4
TCH/F2.4
Any transition between the following half rate Channel Modes /IWD
TRAFFIC/ are supported:
TCH/H
TCH/HS
TCH/H4.8 NT
EN/LZT 123 2697 R5A
1998-08-13
(i) TCH/F + FACCH/F + SACCH/TF
(ii) TCH/H(0,1) + FACCH/H(0,1) + SACCH/TH(0,1).
Interpretation of MODE_MODIFY message from BSC
Channel Mode Modification
© Ericsson Radio Systems AB
— All Rights Reserved —
GSM 05.02 (phase2) version 4.3.0
GSM 08.58 (phase2) version 4.2.0
Signalling
Full rate speech
Full rate data 9.6kbit/s non-transparent
Full rate data 9.6kbit/s transparent
Full rate data 4.8kbit/s transparent
Full rate data 2.4kbit/s transparent
Full rate data 1.2kbit/s transparent
Full rate data 1200/75 bit/s transparent
Full rate data 600bit/s transparent
Signalling
Half rate speech
Half rate data 4.8kbit/s non-transparent
Mode Modify
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