ACS8515REV2.1 Semtech Corporation, ACS8515REV2.1 Datasheet - Page 34

• Manufacturer Part Number: ACS8515REV2.1
• Description: Line Card Protection Switch for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Revision 2.01/December 2005 Semtech Corp.
Figure 10. Automatic Mode Control State Diagram
Figure 10. Automatic Mode Control State Diagram
Figure 10. Automatic Mode Control State Diagram
Figure 10. Automatic Mode Control State Diagram
Figure 10. Automatic Mode Control State Diagram
ADVANCED COMMUNICATIONS
w ait for up to 100s
(higher-priority ref valid
& in revertive mode) or
(15) valid standby ref
[ main ref invalid or
out of lock >100s]
pre-locked2
(state 101)
(10) selected source phase
&
locked
(higher-priority ref valid
(higher-priority ref valid
& in revertive mode) or
& in revertive mode) ]
(4) valid standby ref
(9) valid standby ref
[ main ref invalid or
[ main ref invalid or
out of lock >100s]
(1)Reset
(12) valid standby ref
or out of lock >100s)
(main ref invalid
&
&
(3) no valid standby ref
or out of lock >100s)
&
(main ref invalid
&
regained within
(8) phase
100s
w ait for up to 100s
(13) no valid standby ref
w ait for up to 100s
(14) all refs evaluated
or out of lock >100s)
at least one ref valid
(main ref invalid
Lost phase
(state 111)
(5) selected ref
(state 001)
pre-locked
(state 110)
(state 100)
phase locked
select ref
keep ref
free-run
locked
&
&
34
(7) phase lost
on main ref
ACS8515 Rev2.1 LC/P
(2) all refs evaluated
at least one ref valid
(11) no valid standby ref
&
or out of lock >100s)
Reference sources are flagged as 'val
active, 'in-band' and have no phase ala
All sources are continuously checked
activity and frequency.
Only the main source is checked for p
A phase lock alarm is only raised on a
reference when that reference has los
whilst being used as the main referenc
micro-processor can reset the phase
alarm.
A source is considered to have phase
when it has been continuously in phas
for between 1 and 2 seconds
(main ref invalid
&
(6) no valid standby ref
main ref invalid
&
(state 010)
select ref
holdover
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FINAL