ACS8515Rev2.1LC/P Semtech Corporation, ACS8515Rev2.1LC/P Datasheet - Page 34

• Manufacturer Part Number: ACS8515Rev2.1LC/P
• Description: Line Card Protection Switch For Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Revision 2.00/September 2003
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 f or 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]
Semtech Corp.
(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 f or up to 100s
(13) no valid standby ref
w ait f or 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
f ree-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 'valid' when
active, 'in-band' and have no phase alarm set.
All sources are continuously checked for
activity and frequency.
Only the main source is checked for phase.
A phase lock alarm is only raised on a
reference when that reference has lost phase
whilst being used as the main reference. The
micro-processor can reset the phase lock
alarm.
A source is considered to have phase locked
when it has b een continuously in phase lock
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