Cisco ONS 15454 SDH Specifications Page 247

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Glossary
GL-17
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Priority queuing
Routing feature that divides data packets into two queues: one low-priority and one high-priority.
Protect card
A card in a protection pair or scheme that is provisioned as a protect card to the working card. If the working card fails, the
protect card becomes active. See also working card.
Provisioning user
A security level that allows the user to access only provisioning and maintenance options in CTC. See also Superuser,
Maintenance user, and Retrieve user.
PSC
Protection-Switching Count.
PSD
Protection-Switching Duration.
PTE
Path-Terminating Equipment.
Q
Queue
In routing, a backlog of packets waiting to be forwarded over a router interface.
R
RAM
Random Access Memory.
RDI-L
Remote Defect Indication - Line.
Red band
DWDM wavelengths are broken into two distinct bands: red and blue. The red band is the higher frequency band. The red band
DWDM cards for the ONS 15454 SDH operate on wavelengths between 1547.72nm and 1560.61nm.
RES
Reserved.
Retrieve user
A security level that allows the user to retrieve and view CTC information but not set or modify parameters. See also Superuser,
Maintenance user, and Provisioning user.
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