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COMSPHERE 3500 Series Data Service Units
2-4 January 1998 3510-A2-GN32-50
2600 Series Compatibility
3500 Series DSUs have no network management
capabilities except when they are used as tributaries in
DATAPHONE 2600 Series networks.
In this application, the functions controlled by the
NMS include the following:
• DSU enable/disable
• Test pattern transmission
• Loopback testing
• Digital testing
• Abort
Figure 2-2 illustrates how a COMSPHERE
6800 Series, DATAPHONE II, or ANALYSIS network
management system (NMS) sends messages to a
2600 Series shared diagnostic unit (SDU) which, in turn,
causes a 2600 Series DATAPHONE II DSU to send the
above commands to a tributary Model 3510 DSU via the
digital network.
Local Area Data Set (LADS)
Operation
Both the 3510 and 3511 Models can be connected to
4-wire, nonloaded metallic pairs. In this application
(Figure 2-3), the DSUs are used as point-to-point local
area data sets (LADS). (See Table 4-2 in Chapter 4.)
Figure 2-2. Multipoint DATAPHONE II 2600 DSU Network
Figure 2-3. Local Area Data Set Connectivity