KX-NT55x and KX-NT511 has port-mirroring function as option.
But KX-NT54x and KX-NT560 does not have it.
In the normal settings (default: Switcing mode).
We can not see the packets from the "PC Port" in this mode.
To do the capturing, we need to set "Repeater mode" to NT55x or NT511.
The operation is followings.
NT551/NT553/NT556
To set "Repeater mode":
(1) Switch off the power of NT500.
(2) Keep pressing [1] + [0] + [INTERCOM] + [CO3], and switch on the power of NT500.
(3) If it is accepted, the firmware version display at starting has "M" at the last.
While starting up, please do not release 4 keys until version display.
If NT500 started up, "Repeater mode" is set.
To set "Switching mode":
(1) Switch off the power of NT500.
(2) Keep pressing [1] + [0] + [INTERCOM] + [CO4], and switch on the power of NT500.
(3) If it is accepted, the firmware version display at starting does not have "M"
at the last.
While starting up, please do not release 4 keys until version display.
If NT500 started up, "Switching mode" is set.