Packet-based Linear MS(RTN)

In this user interface, you can configure 1+1 or 1:N linear multiplex section protection (MSP) station by station.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > Packet-based Linear MS from the Function Tree.

In the NE Explorer, select an NE and choose Configuration > Packet Configuration > Packet-based Linear MS from the Function Tree.

Buttons

Button		Description
Start Protocol		Starts the automatic protection switching (APS) protocol.
Stop Protocol		Stops the APS protocol.
Query	Query Protection Group	Queries the switching status and protocol status of protection groups from the NE.
Query	Query Switching Status	Queries the switching status of the protection group from the NE.

Shortcut Menu Items

Item	Description
Query	Queries the switching status of Linear MS.
Clear	Clears the switching status of Linear MS.
Lockout of Protection	The switching request for the Linear MS is denied, but the reversion of the switching is allowed. NOTICE: When the switching operation are performed, the services may be interrupted.
Forced Switching to Working Channels	Switches a Linear MS forcibly, regardless of the status of the Linear MS. NOTICE: When the switching operation are performed, the services may be interrupted.
Forced Switching to Protection	Switches a Linear MS forcibly, regardless of the status of the Linear MS. NOTICE: When the switching operation are performed, the services may be interrupted.
Manual Switching to Working Channels	Performs manual switching from the working channel to the protection channel. If the protection channel is normal, the switching takes place. If the protection channel fails or must meet a switching request of higher priority, the switching does not occur. NOTICE: When the switching operation are performed, the services may be interrupted.
Manual Switching to Protection	Performs manual switching from the working channel to the protection channel. If the protection channel is normal, the switching takes place. If the protection channel fails or must meet a switching request of higher priority, the switching does not occur. NOTICE: When the switching operation are performed, the services may be interrupted.
Exercise	Simulates the switching operation. It is not a real switching. This function tests the function of the protection group and does not interrupt services.

Parameters

**Table 1** Descriptions of the parameters for Linear Multiplex Section Protection (LMSP) group
Field	Value	Description
Protection Group ID	For example: 1	The ID of the Linear MS protection group.
Protection Group Type	1+1 Protection, 1:N Protection	The protection type of a linear MSP group.
Protection Group Type	1+1 Protection, 1:N Protection	The protection type of a linear MSP group.
Switching Mode	Single-Ended Switching, Dual-Ended Switching	The switching mode of a linear MSP group.
Revertive Mode	Non-Revertive, Revertive	Sets whether the services protected automatically switches back to the working channel after the working channel recovers.
WTR Time (s)	300 to 720 Default: 600	The WTR time of a linear MSP group.
Hold-Off Time (100ms)	0 to 100	Sets the hold-off time of the linear MSP switch, that's the time interval between the time when the system detects signal degrade and the time when the service switching occurs, in order to avoid repeated switching when the service status is not stable. The switching delay time is expressed in 100 milliseconds. For example, if you enter 5, the delay time is 500 milliseconds.
SD Switching	Enabled, Disabled	Whether to enable SD to serve as the MSP switching condition.
Protocol Type	New Protocol, Restructure Protocol Default: New Protocol	Specifies the type of MSP protocol: New Protocol: The protocol that is previously supported and is applicable to new equipment. Currently it is a widely used protocol. Restructure Protocol: Optimized based on the new protocol and provides better protocol protection measures to make the protocol stabler. A combination of the new protocol and the restructure protocol leads to an NE interconnection failure. Hence, ensure the same protocol type is used by the interconnected NEs.
Select Mapping Direction	West Working Unit, West Protection Unit	Selects the direction of the slot mapping relation.
Available Boards	slot number-board name-port number(port name)	Selects the mapping board in the mapping direction.
Mapped Boards	Mapping direction: slot number-board name-port number(port name)	Displays the configured mapping relation, including the mapping direction and the corresponding mapped board.
Protocol Status	Unknown, Already Started	Displays the status of MS protocol.
Protection Subnet	For example: 1+1_MSP_1	Indicates the protection subnet to which the linear MS belongs.
SD/SF PRI Switching Tag	High priority, Low priority	The priority of the SD/SF as a switching condition.
Switching Mode Indication	Indicated, Not indicated	Whether the switching mode is indicated.
Active	Checked, Unchecked	Sets the activation status.
Active Status	Active, Inactive	Sets the activation status.
Unit Type	Working Unit, Protection Unit	Protection unit or working unit.
Unit Name-West	Slot-Board Name-Port No	West protection unit and west working unit of a linear MS protection group.
Switching Status-West	Unknown, Force to Standby, Manual to Standby, Exercise, Switch upon signal degradation, Switch upon signal failure, Lockout, Non-Revertive Request, Force to Active, Manual to Active, Signal Fail-Protection, Signal Degrade-Protection, Wait-To-Restore, Wait-To-Switch, Idle, Switching, Not Locked out	The switching status of the west line.
Protected Unit	Slot-Board Name-Port No	Displays the board that is under protection.
Remote End/Local End	Remote, Local	When the protection group is in Dual-Ended Switching mode, displays whether the switching request is from the remote end or the local end.
Map as VC4	Checked, Unchecked	Set the mapping mode displayed in unit of VC4. This option is available for the equipment that supports the function.