Toshiba TOSLINE S20 - Manual (Page 16)

TOSLINE-S20 Active Star Coupler (ASC25) Instruction Manual 6F3B0360
TOSLINE S20 15
6.4 Function setting switch
Arrangement and names of function setting switches are given below.
Figure 6.3
Name Description Use
TX1
Setting the function of preventive
measures to single-wire breaking Preventive measures to single-wire
breaking
TX10
Setting the function of preventive
measures to single-wire breaking Preventive measures to single-wire
breaking
OPTST
Setting the function for determining
optical power Optical power determination
A.TST
Setting the function for automatic
testing Quality assurance test
Table 6.2
(1) Setting switch "TX1"
Turn the switch to "ON" position, and the function of preventive measures to single-wire
breaking of CH1 is actuated. In the case that, when the function is in "ON" mode, the RX signal of
CH1 cannot be detected during a period of about 400 ms, the transmission of TX signal from CH1
is stopped.
On the port which entered the stop transmission, when the switch is turned to "OFF"
position after the circuit operation is resumed, the transmission is reactivated on receiving signals
from other port. When the switch is turned to "ON" position again, the function is also reactivated.
When the function is in "OFF" mode, TX continues to transmit signals even if RX signal
cannot be detected.
(2) Setting switch "TX10"
Turn the switch to "ON" position, and the function of preventive measures to single-wire
breaking of CH10 is actuated. In the case that, when the function is in "ON" mode, the RX signal
of CH10 cannot be detected during a period of about 400 ms, the transmission of TX signal from
CH10 is stopped.