Step 2 Click Create.
The system displays the Create a Linear Multiplex Section dialog box. Step 3 Set the attributes of the linear MSP group.
NOTE
When Protection Type is set to 1:N Protection, the system displays the message "This service will change to extra service and protection switching will interrupt the service in the protection timeslot."
Step 4 Set the slot mapping relation.
2. In Select Mapping Mode, select the line port to which the working channel corresponds
and click .
3. In Select Mapping direction, select West Protection Unit.
4. In Select Mapping Mode, select the line port to which the protection channel corresponds
and click .
Step 5 Click OK. ----End
Parameters
Parameter Value Range Default Value Description
Protection Type 1+1 Protection, 1:N Protection
1+1 Protection l In the single-ended mode, if the services
on the working channels in a certain direction need to be switched, only the services on the working channels in the direction are switched to the protection channels.
l In the dual-ended mode, the services on
the working channels in two directions are switched to the protection channels.
Switching Mode l Single-Ended
Switching, Dual- Ended Switching (1+1 protection) l Dual-Ended Switching (1:N protection) l Single-Ended Switching (1+1 protection) l Dual-Ended Switching (1:N protection)
Parameter Value Range Default Value Description
Revertive Mode l When Revertive Mode is set to
Revertive, the NE that is in the switching state releases the switching and enables the former working channel to return to the working state some time after the former working channel is restored to normal.
l When Revertive Mode is set to Non-
Revertive, the NE that is in the switching state keeps the state of the former working channel unchanged even though the former working channel is restored to normal unless another switching occurs.
l When extra services need to be
transmitted or several working channels exist, select 1:N protection.
l In the case of other situations, it is
recommended that you select the 1+1 single-ended and non-revertive mode.
l Non-Revertive, Revertive (1+1 protection) l Revertive (1:N protection) l Non-Revertive (1 +1 protection) l Revertive (1:N protection)
WTR Time(s) 300 to 720 600 l This parameter is valid only when
Revertive Mode is set to Revertive.
l When the time after the former working
channel is restored to normal reaches the set wait-to-restore (WTR) time, a revertive switching occurs.
l It is recommended that you use the
default value.
SD enable Enabled, Disabled Enabled l When SD enable is set to Enabled, the
B2_SD alarm is considered as a switching condition.
l It is recommended that you use the
default value.
Protocol Type New Protocol,
Restructure Protocol
New Protocol l The new protocol is much maturer than
the restructure protocol but the restructure protocol is in better
compliance with the standards than the new protocol.
l It is recommended that you select the new
protocol. When the OptiX equipment is interconnected with third-party
equipment, select the restructure protocol if an interconnection problem occurs when the new protocol is adopted.
Parameter Value Range Default Value Description SD/SF PRI
Switching Tag
High priority, Low priority
High priority l When this parameter is set to High
priority, "1101" and "1011" are used as an SF/SD switching request.
l When this parameter is set to Low
priority, "1100" and "1010" are used as an SF/SD switching request.
l It is recommended that you use the
default value. Switching Mode Indication Not indicated, Indicated l Not indicated (1 +1 protection) l Indicated (1:N protection)
l When this parameter is set to Indicated,
the MSP protocol uses K2 (bit 6 to bit 8) to indicate the switching mode (that is, uses code "100" to indicate the single- ended mode and code "101" to indicate the dual-ended mode).
l When this parameter is set to Not
indicated, the MSP protocol does not indicate the switching mode.
l It is recommended that you use the
default value. Slot Mapping
Relation
- - l In the case of 1+1 protection, only one
line port can be mapped as West Working Unit; in the case of 1:N protection, a maximum of three line ports can be mapped as West Working Unit.
l Only one line port can be mapped as West
Protection Unit.
l Ensure that the line port that is mapped as
West Protection Unit and the line port that is mapped as West Working Unit are not on the same board, if possible.
NOTE
Ensure that the MSP groups of the equipment at both ends of the linear multiplex section are set with the same attributes.
Postrequisite
l In the case of the 1:N linear MSP, you need to configure bidirectional cross-connections
between the services and the working channels later. If extra services need to be transmitted, it is necessary to configure bidirectional cross-connections between the extra services and the protection channels.
l In the case of the 1+1 linear MSP, you need to configure unidirectional cross-connections
between the services and the protection channels, in addition to configuring the bidirectional cross-connections between the services and the working channels.
2.5 Creating Cross-Connections of Services
This section describes the cross-connections of services, and consists of two parts: cross- connections of SNCP services and cross-connections of point-to-point services.
2.5.1 Numbering Schemes for SDH Timeslots
Two numbering schemes for VC-12 timeslots are applicable to SDH optical/electrical lines or SDH radio links.