User`s manual

Chapter 1 Overview
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multiplexer function.
To use GFP multiplexing, the groups to be multiplexed are routed, after GFP
encapsulation, to the multiplexer, instead of directly to the group mapper.
Specifically, all the virtually concatenated groups to be multiplexed must use the
same type of VCs.
The GFP multiplexer is configured as follows:
 Selection of the virtually concatenated groups to be multiplexed.
For a MUXpro with six LAN ports, the maximum number of virtually
concatenated groups is 6; therefore, 2 multiplexing options (referred to as
GFP multiplexers) are available:
 One multiplexing group of at least one virtually concatenated group and
the maximum is up to six virtually concatenated groups. All these groups
must use the same type of VCs.
 Allocation of bandwidth guaranteed to each multiplexed group, in 16.67%
increments.
 Assignment of an individual channel identifier (ID) to each group.
 Selection of the primary group. The primary group is the only virtually
concatenated group that is actually mapped as a regular virtually
concatenated group (as explained in the Group Mapper section above, the
mapping defines the bandwidth and routing within the SDH network).
Therefore, by specifying the primary group bandwidth in Step 2 above you actually
specify the bandwidth that is allocated to the multiplexed stream. The bandwidth
guaranteed to each of the other multiplexed groups (referred to as secondary
groups) is the calculated as the fraction of the primary group bandwidth.
Note:
To use GFP multiplexing, all of the multiplexed groups must use
GFP encapsulation.
Groups not connected to the GFP multiplexer may use LAPS
encapsulation.