VTS
- After the VTS5240B upgrades the program, the device cannot be started and will always reboot
- The VTS is able to call VTO, but it shows the network is busy when VTO calls the VTS
- The VTS is able to call VTO, but it does not work in turn
- The voice delay or freeze of the intercom between the VTO and the VTS.
- After the VTS5240B upgrades the program, the device cannot be started and will always reboot.