双速率，信道的首选项能过话音编码首选项来指示，第一次信道分配后全速率和半速率之间的改变是不允许的。

Dual rate, channel preference indicated by the Speech coder preference, changes between full rate and half rate Not allowed after first channel allocation as a result of the request.

youdao

双速率，信道的首选项能过话音编码首选项来指示，第一次信道分配后全速率和半速率之间的改变是允许的。

Dual rate, channel preference indicated by the Speech coder preference, Changes between full rate and half rate allowed after first channel allocation as a result of the request.

youdao

双速率，信道的首选项能过话音编码首选项来指示，第一次信道分配后全速率和半速率之间的改变是不允许的。

DRSN Dual rate, channel preference indicated by the Speech coder preference, changes between full rate and half rate Not allowed after first channel allocation as a result of the request.

youdao