Toshiba TOSLINE S20 - Manual (Page 17)

16 ASC25 Instruction Manual
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.
* For TX2 through TX9, the ASC25 side does not have the function because the preventive
measures are provided to the connected device side.
(3) Setting switch "OPTST"
Turn the switch to "ON" position, and the output side of the whole optical modules is kept
to illuminate continuously. Thus, the optical power can be determined. During the optical fiber
cable laying work, check that the satisfaction of the level requirements at terminals of optical fiber
cables, as needed, using the function. (Refer to page 30.)
Turn the switch to "OFF" position, and the mode returns to normal operation mode.
(4) Setting switch "A.TST"
The switch is a function switch used in the product inspection of Active Star Coupler
before shipment.
When the Active Star Coupler is used, confirm that the switch is in "OFF" position.
Although no mechanical failure occurs when the switch is in "ON" position, the apparatus
cannot be operated in normal state.
* Inquiry relating to (4) is not accepted.