COMSPHERE 3600 Series Data Service Units
1-12
July 1999
3610-A2-GB91-90
Figure 1-4. NMS Interfaces to the SDU (2 of 2)
In-band Secondary Channel Transport
Based upon your entry for the Diag Type (Diagnostic
Type) configuration option within the Diag (Diagnostic)
option set, one of three methods used for in-band
secondary channel transport may be selected:
nondisruptive diagnostics, disruptive diagnostics, and
mixed diagnostics. The following paragraphs describe
each of these methods. Refer to
Tables 6-2
,
6-3
, and
6-4
,
Diagnostic Configuration Options (DSU, DBM, and
General), in Chapter 6 for a description of the
configuration option.
NOTE
Even though the DSU is
configured for nondisruptive
diagnostics, it will also accept
disruptive commands.
Nondisruptive Diagnostics
In a nondisruptive diagnostic network, diagnostic data
is transmitted without interrupting user-transmitted data.
In addition, nondisruptive diagnostics allow the control
DSU to obtain real-time health and status data from its
tributary DSUs and extended circuits. This type of
network is provided through an in-band secondary
channel transport capability. The in-band secondary
channel transport carries diagnostic data while the
user-transmitted data is sent over the primary channel
without interruption.
Three nondisruptive diagnostic techniques are used by
the 3600 Series DSUs. The technique used is dependent
upon whether the circuit is configured for point-to-point,
multipoint, or multichannel multipoint (MCMP). The
technique selected is determined by your LinkConfig
(Link Configuration) selection under the Diagnostic
General option set and MUX Setup configuration options
(
Tables 6-4
and
6-9
through
6-11
in Chapter 6
of this
guide).
Содержание COMSPHERE 3610
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