The present document gives a description of the general baseband operation of half rate speech traffic channels in the
transmitter and in the receiver of GSM Mobile Stations (MS)s and Base Station Systems (BSS)s during Discontinuous
Transmission (DTX).
For clarity, the description is structured according to the block diagrams in figures 1 and 4. Except in the case described
below, this structure of distributing the various functions between system entities is not mandatory for implementation,
as long as the operation on the air interface and on the speech decoder output remains the same.
In the case of BSSs where the speech transcoder is located remotely in the Base Station Controller (BSC), the
implementation of the interfaces between the DTX Handlers and the Radio Sub System (RSS) as described in the
present document together with all their flags is mandatory, being a part of the A-bis interface as described in
GSM 08.61 [10].
The DTX functions described in the present document are mandatory for implementation in all GSM MSs. The receiver
requirements are mandatory for implementation in all GSM BSSs, the transmitter requirements only for those where
downlink DTX will be used.
| Edition : | 14.0.0 |
| File Size : | 1
file
, 90 KB |
| Note : | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages : | 15 |
| Published : | 04/01/2017 |
