Front panel interface：
111: Broadband access port of optical distribution system access unit (RJ45);
112: Broadband access port of optical distribution system access unit (OPTIC);
113: Optical ports 1-4 of the access unit of the optical distribution system to the extension unit.
114: The DEBUG port of the optical distribution system access unit system.
115: The optical distribution system access unit remotely monitors the MODEM SIM card socket.
116: Local monitoring interface for access unit of optical distribution system (ETHERNET).
117: The working status indicator lamp of the access unit of the optical distribution system.
118: The power switch of the light distribution system access unit.
Rear panel interface：
120: Optical distribution system access unit power supply interface 48VDC
121: Light distribution system access unit power supply interface 220VAC
122: Optical distribution system access unit GSM base station coupling port
123: Optical distribution system access unit TDS/WCDMA base station coupling port
124: Optical distribution system access unit LTE base station coupling port
125: Optical distribution system access unit LTE2 base station coupling port
126: External alarm interface
