Major Updates:
1. Fixed an issue with the polite mode for enabling dual timekeeping.
2. Added command 66 to set the analog wideband and narrowband transmission frequency deviation.
3. Added command 67 for companding, applicable only to analog channels 4829.
4. Modified the number of precsbk calls for alarm signaling, reducing the transmission duration and disabling digital calls during alarm signaling.
5. Changed the call hold time setting command to a value range of 1-30 seconds.
6. Added format 2 to command 51 to set the vocoder's AGC function.