Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP)
3
SDH Tunneling Over Cisco ONS 15454 SONET MSPP Systems
OL-21041-01
When provisioned to support SDH signal, the ONS 15454 optical modules continue to report alarms and
performance measurements (PMs) in the same manner as if they were provisioned for standard SONET
transport. This allows an ONS 15454 node supporting SDH transport to report alarms in a consistent
manner with the rest of the SONET nodes in the network.
performance measurements (PMs) in the same manner as if they were provisioned for standard SONET
transport. This allows an ONS 15454 node supporting SDH transport to report alarms in a consistent
manner with the rest of the SONET nodes in the network.
SDH Over SONET Applications
The SDH transport feature of the ONS 15454 addresses a variety of applications, with two applications
depicted in
depicted in
•
A simple SDH point-to-point transport tunnel, where both terminations have the same bit-rate, is the
basic tunneling feature of the ONS 15454.
basic tunneling feature of the ONS 15454.
•
SDH signal aggregation allows the user to consolidate lower speed signals to higher speed signals,
that is STM-1s and STM-4s signals are consolidated into STM-16 or STM-64 signals.
that is STM-1s and STM-4s signals are consolidated into STM-16 or STM-64 signals.
Figure 1
SDH Over Sonet Applications
ONS 15454
SONET/DWDM
sub-network
ONS
15454
ONS
15454
SDH
STM-1/4/16/64
Handoffs
SDH
STM-1/4/16/64
Handoffs
A
Point-to-Point tunnel
B
Aggregation and tunneling
ONS 15454
SONET/DWDM
sub-network
ONS
15454
SDH
STM-4
Handoffs
SDH
STM-16/64
Handoffs
ONS
15454
15454
ONS
15454
15454
ONS
15454
SDH
STM-1
Handoffs
SDH
STM-16
Handoffs
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