Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Service Manual Page 78

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TraverseEdge 2020 Applications and Engineering Guide, Chapter 3: System Applications
Page 3-46 Turin Networks Release 5.0.x
STS-1 as individual VT1.5s.
Figure 3-40 DS3 TMUX VT to STS-1 Mapping
This function allows a single TMUX PLM at a hub location to serve as a TMUX for all SONET network
elements on the entire ring.
Each portless TMUX connection utilizes two STS-1 connections on the TMUX PLM, allowing up to six
total portless connections per PLM. If required, a mix of both physical and portless connections can be
made up to a maximum of 12 STS-1s per TMUX PLM.
Full Management Visibility
Access to both SONET and Asynchronous Performance Monitoring (PM) data is provided allowing all
elements of the connection to be monitored. The TE-2020 TMUX PLM provides visibility for all applica-
ble VT1.5, DS1, DS3, EC-1, and STS-1 performance management statistics from a common graphical user
interface for all network elements on the ring.
This is particularly important where an inter-carrier "hand-off" is at the DS3 level and allows identification
of performance problems entering a carriers network as opposed to errors originating in the SONET por-
tion of the network.
DS3 TMUX Shelf Configuration Options
The DS3 TMUX PLM fits into the standard TE-2020 DS3/EC-1 (ETS1) Tributary Shelf. It provides up to
48 ports per shelf and can operate as either a working or protect PLM. As a protect PLM it can support up
to 1:4 protection for any mix of standard TE-2020 DS3 and TMUX PLMs.
Figure 3-41 DS3 TMUX in an ETS1
The DS3 TMUX PLM may also be installed in the ETS2 shelf supporting 12 ports per shelf with 1:1 pro-
tection.
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