Definitions of Service Request Severity

For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.

To open a service request by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)

EMEA: +32 2 704 55 55

USA: 1 800 553-2447

For a complete list of Cisco TAC contacts, go to this URL:

http://www.cisco.com/techsupport/contacts

Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—Your network is “down,” or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

11Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:

http://www.cisco.com/go/marketplace/

•Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:

http://www.ciscopress.com

•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:

http://www.cisco.com/packet

•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:

http://www.cisco.com/go/iqmagazine

•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

http://www.cisco.com/ipj

•World-class networking training is available from Cisco. You can view current offerings at this URL: http://www.cisco.com/en/US/learning/index.html

1720 specifications

Cisco Systems 1720 is a versatile and reliable router that has been popular in various networking environments since its introduction. Designed primarily for small to medium-sized businesses, the Cisco 1720 is renowned for its compatibility with a range of Cisco's networking technologies, making it an ideal solution for those looking to enhance their network infrastructure.

One of the standout features of the Cisco 1720 is its support for direct internet access, which can be achieved through multiple protocols such as Point-to-Point Protocol (PPP) and High-Level Data Link Control (HDLC). This allows businesses to connect seamlessly to the Internet, ensuring that operations can run smoothly and efficiently. Additionally, the router includes integrated multi-protocol routing capabilities, which support various network protocols such as IP, IPX, and AppleTalk. This multifaceted functionality is crucial for companies that operate heterogeneous networks.

Security is another significant aspect of the Cisco 1720. It comes equipped with built-in firewalls and Access Control Lists (ACLs) to manage and restrict unauthorized access to sensitive network resources. This makes it vital for businesses that prioritize data integrity and security in their operations. Furthermore, the router supports Virtual Private Network (VPN) functionality, enabling organizations to establish secure connections for remote workers or branch offices.

The hardware specifications of the Cisco 1720 further enhance its utility. The router can host various types of network interface cards, giving users the flexibility to customize their networking environment. It also features a modular design allowing for easy upgrades and maintenance, which is crucial for adapting to changing business needs and technologies.

Overall, the Cisco Systems 1720 router combines reliability, security, and adaptability, making it an excellent choice for businesses seeking to build robust and efficient networks. Its ability to implement various routing protocols, enforce security measures, and provide scalable options for expansion serves as a foundation for successful connectivity in small to medium-sized organizational settings. The Cisco 1720’s durability and feature set solidify its place as a valuable asset in network infrastructure solutions.