5 automatic change over, 6 single converter configuration example, 3ghd-oe / 3ghd-oe-2 rev. f – Nevion 3GHD-OE User Manual

Page 10: 1 trigger condition

3GHD-OE / 3GHD-OE-2

Rev. F

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3.5 Automatic change over

Dual optical converter has an automatic changeover module. This module has the possibility
to have an automatic change over on the input. This can be used in redundancy systems
where the user wants automatically switch to a backup port when the main input loses signal.
This function can be turned with DIP#5. From GYDA this function can be turned on for each
converter. Each converter can be configured to what is main and backup input by DIP#2 and
DIP#4 or from GYDA.

3.5.1 Trigger condition

Loss of optical power trigs the automatic change over. When the main input loss optical
power the backup input is selected. When the backup input is active an alarm is displayed in
Gyda. When the main input optical power is restored the converter switches immediately
back to main input and the alarm is restored.

Note that bit error or loss of lock on reclocker does not trigger the ACO.

3.6 Single converter configuration example

Optical input

I/O2

I/O1

RCL1

PRI1

RCL2

PRI2

SWP

DOP
OVR

Reclocker 2

3G/HD/SD-SDI

Reclocker