System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
MSP Linear Multiplex Section Protection
Aastra Proprietary Information Page 3-21
• A request received from the far end is executed either using the
protocol in compliance with ITU-T G.841 or a proprietary K1/K2
protocol. These requests are valid only in the bi-directional mode.
Requests include:
— Lockout of protection
— Force switch traffic to working channel
— Force switch traffic to protection channel
— Manual switch traffic to working channel
— Manual switch traffic to protection channel
— SF on operating path
— SD on operating path
— SF on protection path
— SD on protection path
— Wait to restore
— Exercise
— Reverse request
— Do not revert
— No request
Protocols for MSP switchover
Two different protocols can be used for MSP 1+1 control via K1- K2 bytes:
• the ITU-T G.841 protocol and
• a proprietary (accelerated) K1/K2 protocol with enhanced switchover
behaviour.