Maintenance-Object Repair Procedures
555-233-143
8-830 Issue 1 May 2002
FIBER-LK (Fiber Link)
A fiber link consists of the endpoint boards that are connected via the optical fiber,
the lightwave transceivers or metallic connections on the endpoint boards, and, if
administered, the DS1 Converter (DS1 CONV) complex that exists between the
two fiber endpoints. The fiber endpoints are EI circuit packs and/or SNI (SNI)
circuit packs.
Three types of fiber links exist in G3r systems:
Fiber link errors and alarms are generated only on fibers that have at least one
SNI endpoint. Fiber errors for fibers that have EIs as both endpoints are detected
by the EI circuit pack, thus generating off-board EXP-INTF errors and alarms.
Fiber errors and alarms on EI-SNI fiber links generate FIBER-LK and/or off-board
EXP-INTF errors and alarms.
Fiber links are administered via add fiber-link F or add fiber-link next, where F
is the fiber link’s number. The 2 endpoints of the fiber are administered (EI and EI,
EI and SNI, or SNI and SNI). In a duplicated PNC configuration, both the A- and
B-PNC’s fiber links are assigned with the same fiber link’s number. The fiber links
are designated by F P, where F is the fiber link’s number and P is the PNC, A-PNC
or B-PNC. In addition, a DS1 converter complex may be assigned to the fiber link.
In a duplicated PNC configuration, both the A- and B-PNC’s DS1 converter
complexes are administered with the same fiber link’s number. DS1 facilities and
parameters can be modified via change fiber-link F P.
An individual fiber link can be displayed with the display fiber-link F command.
Every fiber link can be listed using the list fiber-link command.
MO’s Name (in
Alarm Log) Alarm Level Initial Command to Run
1
1. F is the fiber link number; pnc is either “a-pnc” or “b-pnc” (always “a-pnc” for a high-, or
critical-reliability system).
Full Name of
MO
FIBER-LK MAJOR test fiber F pnc s Fiber Link
FIBER-LK MINOR test fiber F pnc s Fiber Link
FIBER-LK WARNING test fiber F pnc s Fiber Link
EI-to-EI fiber This type of fiber is an EI-to-EI connection and is only used in direct
connect port network connectivity (PNC).
EI-SNI fiber This type of fiber is an EI-to-SNI connection and is only used in
Center Stage Switch (CSS) PNC.
SNI-SNI fiber This type of fiber is an SNI-to-SNI connection and is only used in
CSS PNC when two switch node carriers are connected in a 2- or
3-switch node configuration.
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