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Signalling: Connection Control
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.170
E-12
Fig. 4-76 Connection Control – Network parameters (panel)
Traffic
Mode
The
Traffic Mode
softkey determines the speech or data channel coding and the
transmission rate in the traffic channels:
Full Rate Version 1
Use of standard full-rate speech coding
Full Rate Version
2
Enhanced full rate speech coding
Half Rate Version 1
Half-rate speech coding
Full Rate Data 4800
Full-rate coding with fixed transmission rate in baud
Full Rate Data 9600
Full Rate Data 14400
Half Rate Data 2400
Half-rate coding with fixed transmission rate in baud
Half Rate Data 4800
Note:
A transmission mode can only be selected if the connected mobile station
is equipped with the appropriate speech coder. If this is not the case, the
CMU automatically sets the default speech coder (Full Rate Version 1).
The following GPRS/EGPRS traffic modes are compatible with reduced signalling
mode only: If one of the modes is selected, the
Signalling Channel
is automatically
set to
NONE
(see p.
4.176
). The
Signalling Channel
can not be changed while one
of the (E)GPRS traffic modes is active.
The (EGPRS) modes can be used to perform
Receiver Quality
tests specific to
packet-data channels and to measure the Data Block Error Rate (DBLER). GPRS
with full signalling and EGPRS requires options CMU-K42/-K43 (see section
GPRS
Signalling and EGPRS
on p.
4.187
ff.).
CS1 Test Mode
Coding according to coding scheme 1
(CS1)
specified for
GPRS.
...
CS4 Test Mode
Coding scheme 4
(CS4)
specified for GPRS.
MCS1 Test Mode
Modulation and coding scheme 1
(MCS1)
specified for
EGPRS.
...
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135-1095-0799
Содержание CMU-K20
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