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Page 1of 3 AMG2780R-DR-CWDMn
Instruction Sheet D15339-
00
AMG2780R-DR-CWDMn
Instruction Manual
2700 Series Repeater for use on a Dual Redundant dual fibre
ring using CWDM wavelengths
The AMG2780R-DR-CWDMn is a rackmount repeater designed to operate in a dual fibre dual
redundant loop at a CWDM wavelength ‘n’. It is designed to plug into a standard AMG2000 or
AMG2005 rackmount system.
Functional Description
The AMG2780R-DR-CWDMn receivesan optical signal
from both a primary and secondary optical input.
In normal operation where connection of both the
previous unit and the subsequent unit are OK, the optical
signals on both the primary and secondary routes are
regenerated on the respective optical outputs.
If the primary optical input signal is not present, the unit
will shut down the secondary optical output to inform the
previous unit that the signal route is not OK. The previous
unit will then send out that was on the primary optical
output on its secondary optical output. This signal will be repeated around the ring to get back to this
AMG2780R-DR-CWDMn. on the secondary route. As the primary input is not present on this unit, the
signal from the secondary optical input is now repeated onto the primary optical output. Thus
maintaining integrity of the transmission on the primary optical signal route.
If the secondary input signal is not present, the unit will assume that the route to the next unit is not
OK and send out the signal that was on the primary optical output onto the secondary optical output.
This signal will be transmitted to the next unit around the ring in the opposite direction on the
secondary route.
Primary
Secondary
CH 5
CH 6
CH 7
CH 8 CH 4
CH 3
CH 2
CH 1
OPTO IN
OPTO OUT
OPTO OUT
OPTO IN
2780R-DR-CWDM1
PRIMARY OPTO SYNC
TX O ORX
O
SECONDARY OPTO SYNC
TXO ORX
O
2780R-DR-CWDMn
2700 optics (Primary)
TXRX
2700 optics
(Secondary) RXTX
CWDMn
CWDMn CWDMn
CWDMn
PRIMARY
OPTO IN
Primary Signal Direction
Secondary Signal Direction
SECONDARY
OPTO OUT PRIMARY
OPTO OUT
SECONDARY
OPTO IN
( to primary input and
secondary output of next
2783-1,2,4-DR,or 2783-DR)
( From primary output and
secondary input of previous
2783-1,2,4-DR,or 2783-DR)