Industrial Telephone Optical Terminal

Telephone Optical Terminal·📅UpdatedMay 12, 2026·✍️管理员

The Industrial Telephone Optical Terminal provides 2 telephone interfaces and 2 shared 100M Ethernet interfaces through 1 fiber optic channel. The Ethernet interfaces of the 2-channel telephone optical terminal can be arbitrarily divided into VLANs. The Industrial Telephone Optical Terminal extends voice and data services to various user areas, serving as a replacement for remote small offices, enabling cross-boundary number allocation, and alleviating the load on switching offices. Alternatively, it resolves the limitations of twisted pair in terms of bandwidth and transmission distance within urban areas, expanding the service range of switching offices. This device can be widely applied in telecommunications data services, power, banking, public security, military, schools, highways, and other sectors for public telephone network access and dedicated line information transmission.

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Overview:

The Industrial NT202B Telephone Optical Terminal extends voice and data services to various user areas, serving as a replacement for remote small offices, enabling cross-boundary number allocation, and alleviating the load on switching offices. Alternatively, it resolves the limitations of twisted pair in terms of bandwidth and transmission distance within urban areas, expanding the service range of switching offices. This device can be widely applied in telecommunications data services, power, banking, public security, military, schools, highways, and other sectors for public telephone network access and dedicated line information transmission.

Product Features:

![Product Features:](

Product Features:

The optical terminal provides 1 dual-fiber (single-fiber) optical channel;
The optical terminal provides 2 ordinary telephone interfaces with Caller ID functionality;
The optical terminal provides 2 groups of shared 100M Ethernet channels, and the 2 groups of Ethernet interfaces can be arbitrarily divided into VLANs;
Equipped with comprehensive alarm indication functions;

Technical Specifications:

Optical Interface

Interface Type	FC (SC, etc. customizable)	Fiber Mode	Single-mode (multi-mode optional)
Fiber Rate	155bps±50ppm	Wavelength	1310nm
Transmit Power	-2～-11dBm	Receiver Sensitivity	Better than -36dBm

Ethernet

FXO/FXS Interfaces

Audio Range	300Hz~3400Hz	Impedance	Triple complex impedance 200Ω+560Ω//0.1μF
Compression Rate	A-law per ITU G.711	Loop Current	25mA/channel