For 4/8/16-channel series product.
The corresponding channel light becomes on when
system is recording.
For 32/64-channel series product:
When the light flashes slowly, it means the
corresponding channel of 1-16 channel is
recording now (Such as channel 1).
When the light flashes fast, it means the
corresponding channel of 17-32 channel is
recording now (Such as channel 17)
When the light becomes on, It means the
corresponding 2 channels are recoding now (Such
as channel 1 and channel 17.).
The channel indictor light here does not show
the status of the 33-64-channel.