The ZXA10 F821 is a LAN MDU of the plug-in box type. Its three service slots allow 8 FE, 8 FE (PoE), 24 POTS, 16 POTS, 8 POTS and 8 E1 boards to be intermixed. The MDU provides access to Ethernet, TDM, IPTV and VoIP services in scenarios including residences, FTTB/O, IP transformation for railway working teams, and WLAN hotspot coverage. To accommodate different subscriber penetration rates and reduce initial investments, its cards can be plugged in flexibly. The MDU can be deployed in the corridor, on the desktop, in the communications cabinet, etc.