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Preface
Technical Assistance Center
Cisco TAC Web Site
78-15095-01
Order Cisco learning materials and merchandise
•
•
Register for online skill assessment, training, and certification programs
You can self-register on Cisco.com to obtain customized information and service.
To access Cisco.com, go to the following URL:
http://www.cisco.com
The Cisco TAC is available to all customers who need technical assistance with a
Cisco product, technology, or solution. Two types of support are available through
the Cisco TAC: the Cisco TAC Web Site and the Cisco TAC Escalation Center.
Inquiries to Cisco TAC are categorized according to the urgency of the issue:
Priority level 4 (P4)—You need information or assistance concerning Cisco
•
product capabilities, product installation, or basic product configuration.
Priority level 3 (P3)—Your network performance is degraded. Network
•
functionality is noticeably impaired, but most business operations continue.
Priority level 2 (P2)—Your production network is severely degraded,
•
affecting significant aspects of business operations. No workaround is
available.
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Priority level 1 (P1)—Your production network is down, and a critical impact
to business operations will occur if service is not restored quickly. No
workaround is available.
Which Cisco TAC resource you choose is based on the priority of the problem and
the conditions of service contracts, when applicable.
The Cisco TAC Web Site allows you to resolve P3 and P4 issues
both cost and time. The site provides around-the-clock access to online tools,
knowledge bases, and software. To access the Cisco TAC Web Site, go to the
following URL:
http://www.cisco.com/tac
Cisco ONS 15540 ESP Hardware Installation Guide
Obtaining Technical Assistance
yourself,
saving
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