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COMSPHERE 3550 Series Data Service Units
3-10 February 1995 3550-A2-GB20-10
Tributary DSU Addressing
Tributary DSU addresses are user-definable, but take
care to ensure that their addresses are unique on a
multipoint circuit. If two tributaries are assigned the same
address, you will not be able to communicate with either
one.
The control DSU accesses its tributary by specifying
the tributary’s address.
The 6700 Series NMS accesses the DSU via its
network address. To access a tributary DSU, the NMS
first addresses the control, then the tributary. An address
issued from the NMS takes the format of control
channel/control network address/tributary network
address. This is called link-level network addressing.
Figure 3-5 shows an example of DSU and DBM
addressing, as well as link-level network addressing.
Refer to Chapter 4 to learn how to set the DSU’s
network address.
Verifying Operation and
Testing Connections
Verification testing should be performed after any
installation.
After installing and configuring the circuit (including
control and tributary DSUs, the DDS network, the DBMs
and their dial connections), perform a series of tests from
the control DSU to verify network operation (using either
the SDCP or NMS).
Figure 3-5. Addressing Example