Marconi OMS 1200
Technical Product Description
221 02-ZAP 701 25/1 Rev C 2006-08-04
© Ericsson AB 2006
03PHB00004AAV-CUA
Commercial in confidence
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[Forced Switch (Worker Channel)].
•
Clear.
Remote multiplexer requests detailed below are:
•
Wait To Restore
•
Exercise
•
Reverse Request - ITU-T/ETSI standard protocols ONLY
•
Do Not Revert
•
No Request.
7.4.8
Forced Switch to Worker
Forced Switch (Protection Channel)
Causes traffic to switch to (or be maintained on) the working channel. This command
has a higher priority than received SF or SD conditions on the working channel and
therefore traffic remains on the working channel regardless of any failure indications
on this channel.
For single-port STM-n cards the in-traffic LED on the protection channel card can be
extinguished, but in bi-directional mode only, and only when the remote end has
switched.
For dual-port STM-1 cards the in-traffic LEDs are always lit, since each separate port
may or may not be in protection, and possibly with different protection card pairings.
7.4.9
Forced Switch to Protection
Forced Switch (worker channel)
Causes traffic to switch to (or be maintained on) the protection channel unless a
higher priority switch state is in effect, or an SF condition exists on the protection
section.
This command eliminates the possibility of disruption of revenue earning traffic being
caused by removal of the working channel card.
For single-port STM-n cards the in-traffic LED on the working channel card can be
extinguished, but in bi-directional mode only, and only when the remote end has
switched. If a subsequent SF occurs on the protection channel card, the in-traffic LED
is lit on the worker and traffic is switched back to the worker; Signal Fail Protection
overrides a Force Switch (Worker Channel).
For dual-port STM-1 cards the in-traffic LEDs are always lit, since each separate port
may or may not be in protection, and possibly with different protection card pairings.