2.8.8 Protection schemes
2.8.8.1 Protection schemes with ODU300
Supported Protection types:
[1]
RPS (Radio Protection Switching) Hitless for each radio direction (RPS-RX)
•
RPS is distributed in 9500 MSS modules before termination of 9500 MSS frame.
[2]
EPS (Equipment Protection Switching) for each module type
•
Both Working and Spare modules send its own signal to the Core-E. Core-E selects the best
signal.
[3]
HSB-TPS (Hot StandBy - Transmission Protection Switch)
•
Spare ODU module is squelched.
2.8.8.1.1 RPS Switching Criteria
The switching criteria are:
–
SF (Signal Fail): generated from transmission and equipment alarms affecting the Rx radio section:
–
Demodulator Fail
–
IDU-ODU cable loss
–
LOF of aggregate signal radio side
–
Main and spare ODU, IDU HW failures (card fail)
–
HBER (high BER)
–
EW (Early Warning)
2.8.8.1.2 EPS Switching Criteria
The switching criteria are:
–
Peripheral Card Fail (switching off of the peripheral included)
–
Peripheral Card Missing
–
LOS of all the tributaries (of course only in case of PDH local access peripheral protection) managed
via SW.
2.8.8.1.3 HSB Switching Criteria
The switching criteria are:
–
Radio Interface Peripheral Card Fail (switching off of the peripheral included)
–
Radio Interface Peripheral Card Missing
–
MSS-ODU cable loss
–
ODU TX chain alarm (this is an OR of the following alarms: LOS at ODU input, modFail, txFail, ODU
card fail).
User Manual
Product information and planning
3DB18809AAAA Issue 1
9500 MPR Rel. 3.1
153/980