Currently there are many organizations, factories, enterprises with multiple offices separated large distances when the voice signal at a distance of several kilometers, the size of the transmission signal is not clear anymore.

Especially in a noisy environment as large as electrical, steel production ... The expansion of telephone network on the internal optical cable will eliminate the noise signal transmission lines for the best voice.

System architecture
Here are some typical structures:
- Only open phone line:


- Expanding the network device with extended LAN:



- Connect multiple applications: including Voice, video, Ethernet, RS232, V35, ....



Please contact us for specific advice.