Ring Protection Switching Criteria - Alcatel-Lucent 9500 MXC User Manual

Chapter 3. 9500 MXC Nodes
Service Restoration Times for Dual Protection

Ring Protection Switching Criteria

Radio Wrap Conditions
Vol. II-3-98
For the subordinate links their service restoration times as individual protected
links are unaltered from those stated above for hot-standby and space diversity.
The service restoration times for a master switch are as follows, and apply for a
switch between:
• One protected link to a protected link
• One protected link to a non-protected link
• A non-protected link to a protected link
Receive Switch
• 200 ms maximum. Applies to the master protection switch event.
Note that with a frequency diversity master there is no Tx switch event; both
transmitters are online transmitting
This section describes the ring-wrapping switching criteria for radio (RAC/ODU)
and fiber (DAC 155oM) closures. Refer to:
• Radio Wrap Conditions on page 3-98
• Fiber (DAC 155oM) Wrap Conditions on page 3-99
• Wrap and Unwrap Times on page 3-99
• Unwrap Timers on page 3-99
Ring protection protects the payload and alarm I/O addressing between nodes;
ring protection does not protect auxiliary data.
Conditions for ring wrapping:
• Tx path failure:
• Tx synthesizer not locked
• Tx transceiver failure
• Tx power failure
• Tx ODU IF synthesizer not locked
• Tx RAC IF synthesizer not locked
• Modulator not locked
• Rx path failure:
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