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User’s Manual of SGSW-24040 / 24240 Series
541
DC Disconnect
DC Disconnect detection involves measurement of current. Naturally, a disconnected PD stops consuming current, which can
be inspected by the PSE. The PSE must therefore disconnect power within 300 to 400 ms from the current flow stop. The lower
time boundary is important to prevent shutdown due to random fluctuations.
AC Disconnect
This method is based on the fact that when a valid PD is connected to a port, the AC impedance measured on its terminals is
significantly lower than in the case of an open port (disconnected PD).
AC Disconnect detection involves the induction of low AC signal in addition to the 48 VDC operating voltage. The returned AC
signal amplitude is monitored by the PSE at the port terminals. During normal operation, the PD's relatively low impedance
lowers the returned AC signal while a sudden disconnection of this PD will cause a surge to the full AC signal level and will
indicate PD disconnection.
Содержание GSW-24040R
Страница 42: ...User s Manual of SGSW 24040 24240 Series 42 Figure 2 13 SGSW 24040 24040R Series Stack Ports ...
Страница 62: ...User s Manual of SGSW 24040 24240 Series 62 Figure 4 1 5 SGSW Managed Switch Main Functions Menu ...
Страница 142: ...User s Manual of SGSW 24040 24240 Series 142 Figure 4 6 10 Port 1 Port 6 VLAN Configuration ...
Страница 199: ...User s Manual of SGSW 24040 24240 Series 199 Figure 4 9 14 Voice VLAN Configuration page screenshot ...
Страница 223: ...User s Manual of SGSW 24040 24240 Series 223 Figure 4 11 4 Network Access Server Configuration page screenshot ...
Страница 260: ...User s Manual of SGSW 24040 24240 Series 260 Figure 4 12 1 Port Limit Control Configuration Overview page screenshot ...
Страница 452: ...User s Manual of SGSW 24040 24240 Series 452 Example Show RADIUS statistics SWITCH security aaa statistics ...
Страница 474: ...User s Manual of SGSW 24040 24240 Series 474 Parameters vid VLAN ID 1 4095 Default Setting disable ...
Страница 510: ...User s Manual of SGSW 24040 24240 Series 510 Example Enable the mirror mode for port 1 4 SWITCH mirror mode 1 4 enable ...