IBM3229P2035
Advance
IBM Packet Routing Switch Serial Interface Converter
Figure 41: Switch Fabric DASL Port Synchronization Sequence
Switch Core
Adapter
Fabric Port Available
(FPA) is Inactive
Port is
Inactive
Sequence of Operation
Port is Inactive
Check for Switch Clock
Control Processor Request
to Enable Port N
When switch Clock is Detected:
Wait for Valid
Signal on Input Port
— Configure Serial Interface
in Service Plane
Check that NO valid
Check that FPA is OFF
Dasl Signal is Detected
FPA is OFF:
Check that Adapter
Port Available is OFF
From Mate Adapter
— Enable DASL Port
— Set DASL Receiver in Hunt
— Send DASL Synch Pattern
APA is OFF:
— Enable DASL Port
Wait for Receive
— Set DASL Receiver in Hunt
— Send DASL Synch Pattern
Synchronization Status
Wait for Receive
Synchronization Status
Receiver Synchronized
Receiver Synchronized:
Check for FPA
— Set FPA
Check for APA
(10 ms)
FPA is ON:
— Set FPA
APA is ON:
— Stop Sending Sych Pattern
— Stop Sending Synch Pattern
Data Mode
Data Mode
prssi.02.fm
March 1, 2001
Appendix A: Data Aligned Serial Link (DASL)
Page 149 of 154
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