Parameter Name |
T200 SACCH TCH SAPI3(10ms) |
|---|---|
Description |
This parameter specifies the expiry value of timer T200 used for the SACCH over the Um interface when the TCH supports SAPI3 services. For details of the function of timer T200 and the effect of the parameter, see the descriptions of the T200 SDCCH (5 ms) parameter. SAPI0 maps with speech services, and SAPI3 maps with short message services. |
GUI Value Range |
[1,255] |
Default Value |
200 |
Unit |
Milliseconds |
Step |
10 ms |
Modification Rules |
None |
Configuration Policy |
If timer T200 is set to a too small value, the transmit end may mistakenly regard that the link is faulty and the data transmission fails before the transmit end receives a response from the peer end. If timer N200 is set to a too small value, the number of data retransmissions is reduced and the success rate of transmission is reduced.If T200 and N200 are set to too great values, the channels are seized all along when the link is faulty. Thus, resources are wasted. |
Recommended Value |
200 |
Parameter Relationship |
Timer N200: N200 of establish, N200 of release, N200 of SACCH, N200 of SDCCH, N200 of FACCH/TCHH, and N200 of FACCH/TCHF |
BSC Feature |
None |
Parameter Class |
Parameters About Radio Resources |
Caution |
None |