Extension unit front panel from left to right interface:
211: Optical distribution system extension unit DC 48V output interface
212: Dual wideband access interface for optical distribution system extension unit (RJ45)
213: Dual wideband access interface for optical distribution system extension unit;(Optic)
214: Cascading optical port (up and down) for extension unit of optical distribution system
215: Optic distribution system extension unit power supply indicator
216: The remote power supply interface between the extension unit of the optical distribution system and the remote unit 1-8
217: Debug port of optical distribution system extension unit
218: Optical distribution system extension unit remote monitoring MODEM SIM card socket (not in use)
219: Optical Distribution System Extension Unit Local Monitoring Interface (Ethernet)
21A: Working status indicator of light distribution system extension unit.
21B: Power switch of optical distribution system extension unit
21C: Optical distribution system extension unit to the optical port of the remote unit 1-8.
Extension unit rear panel interface description:
221: Power supply interface of optical distribution system expansion unit is 220VAC
222: Power supply interface of optical distribution system extension unit 48VDC
223: External alarm interface
