| 摘要 |
The message transmission system has an optical transmitter (1) connected by an optical conductor (L1) to an optical power divider (V1) which has three outputs. The optical conductor (L2) is connected to an optical receiving unit (2), and the optical conductor (L3) is joined to another optical receiving unit (3). Both units use a photodiode to convert the light into an electrical signal. The subscribers (8,9) receive the signals by way of the distributing network (E1, E2). The optical conductor (L4) leads to the divider (V2) with two outputs. The optical conductors (L5, L6) are each connected a stationary radio station (4,5), joining with the subscriber terminals (6,7) by radio. |
