9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. II-3-111
Figure 3-62. 4+4 Hot-standby Operation
Ring Node Configurations
RAC 40 CCDP operation may be included within 9500 MXC ring networks to
support two concentric rings on the same frequency channel.
The rings may be configured for any of the capacities supported by the RAC 40,
but bear in mind:
• For STM1/OC3 rings, ring protection requires an external SDH mux. 9500
MXC ring links are configured as point-to-point.
• For PDH rings 9500 MXC Super-PDH ring protection applies.
• For single gateway rings (all ring traffic sourced and sunk at one ring site)
the maximum capacity supported on each ring is 64xE1 or 84xDS1. For
more information refer to Appendix E.
• For Ethernet rings an RSTP switch is required. An RSTP function (RWPR) is
included with the DAC GE. With the DAC ES, an external RSTP switch is
required.
• Each ring operates autonomously.
CT is used to individually configure the two ring links.
• The V and H ring links are separately configured for identical frequency, Tx
power and capacity/bandwidth.
• XPIC cables are installed between the east RAC 40s, and between the west
RAC 40s.
Co-channel ring links can also be 1+1 protected:
V
H
ODU 300s
Ch B Secondary
Ch A Primary
Ch A Secondary
Ch B Primary
Ch C Primary
Ch C Secondary
Ch D Primary
Ch D Secondary
ACCPCCDP
F1
F2
F1
F2
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