Parameter Name |
Speech Version |
|---|---|
Description |
This parameter specifies the speech version supported by the BSC. The value of this parameter has six bits. The six bits (from the most significant bit to the least significant bit) indicate the following speech versions respectively: half-rate version 3, half-rate version 2, half-rate version 1, full-rate version 3, full-rate version 2, and full-rate version 1. Here, versions 3, 2, and 1 indicate AMR, EFR, and FR respectively. If a bit is 1, you can infer that the BSC supports the corresponding speech version. If a bit is 0, you can infer that the BSC does not support the corresponding speech version. For example, if the parameter is set to 001011, you can infer that full-rate versions 1-2 and half-rate version 1 are supported. In the HDLC networking mode, if only full-rate version 1 among the three full-rate versions is selected, it is recommended that the AEC delay of all the DSPs in the DPUX and DPUC be set to 141 so that the downlink traffic flow is further decreased. |
GUI Value Range |
[Support Half-rate Version 3,Support Half-rate Version 2,Support Half-rate Version 1,Support Full-rate Version 3,Support Full-rate Version 2,Support Full-rate Version 1] |
Default Value |
001011 |
Unit |
None |
Step |
- |
Modification Rules |
None |
Configuration Policy |
None |
Recommended Value |
001011 |
Parameter Relationship |
None |
BSC Feature |
None |
Parameter Class |
Parameters About Radio Resources |
Caution |
The differences between the speech versions are as follows: Full-rate version 1 uses full-rate speech coding and the coding rate is 13 kbit/s. Full-rate version 2 uses enhanced full-rate speech coding and the coding rate is 12.2 kbit/s. At present, speech version 3 is supported. |