Reference Manual

Transport network O&M functions-DXX Support
BSC
DXX
NMS
DXX
DXX
Transport
Module
RBS
2000
RBS
2000
RBS
2000
DXX
Support
RBS
2000
DXX
Support
P002615B
Figure 149 Example of DXX support in an RBS 2000 network.
The RBS 2000 nodes including the DXX support functions will be
visible as nodes in DXX/NMS, and the layer 1 transmission in the RBS
nodes will be supervised from NMS. The DXX support provides early
warnings in case of faults and degradation of the trunks, enabling the
operator to take actions at an early stage. The functions are described in
Section 57.4 on page 450
DXX uses specified layer 3, and layer 7 protocols for the transport
network O&M. The layer 2 protocol used is LAPB. The protocols used
are described in Section 57.4 on page 450.
57.2 References
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
All ITU-T references refer to the White Book (ITU = International
telecommunications Union).
[TIH_E1] Function group Transmission Interface
Handling G.703 2048 kbit/s.
[TIH_T1] Function group Transmission Interface
Handling DS1 1544 kbit/s.
[X.25] ITU-T Recommendation X.25, interface
between DTE and DCE.
448 (485)
EN/LZT 720 0008 P2A
2001-11-28
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