Cisco AS5800 Specifications download pdf (Page 307)

Glossary

Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide

DOC-7810814=

IP address

The 32-bit address assigned to hosts using TCP/IP. An IP address belongs to one of five classes (A, B, C, D, or E) and is written

as four octets separated by periods. This is called dotted decimal format. For example: 172.16.211.0. Each address consists of

a network number, an optional subnetwork number, and a host number. The network and subnetwork numbers together are

used for routing, and the host number is used to address an individual host within the network or subnetwork. A subnet mask

is used to extract network and subnetwork information from the IP address. Also called Internet address. See also IP and subnet

mask.

IP address pools

Administratively defined numeric group of available internet protocol (IP) network device identifier. Range of numeric IP

addresses set aside for a specific allocation purpose, such as DHCP. As clients connect to the Network Access Server (NAS),

they request and are assigned an IP address from the configured IP address pool.

Integrated Services Digital Network (ISDN)

In its simplest form, called Basic rate ISDN, it provides a means of transmitting two voice channels (each operating at 64 Kbps)

and one data channel (operating at 16 Kbps) over a single pair of twisted copper conductors. The two voice channels are called

bearer, or “B” channels; the single data channel is the “D” channel. A more complex form of ISDN is called Primary rate ISDN;

in this system there are 23 "B" channels operating at 64 Kbps and one “D” channel operating at 64 Kbps. Thus the transmission

capability of Basic rate is 144 Kbps, and that of Primary rate ISDN at 1.5 Mbps.

Internet service provider (ISP)

A company that allows home and corporate users to connect to the Internet.

ITU-T

International Telecommunications Union, Standardization Sector. ITU-T is the telecommunication standardization sector of

ITU. This sector is responsible for making technical recommendations about telephone and data (including fax)

communications systems for service providers and suppliers. The ITU-T carries out the functions of the former CCITT. A sister

organization, ITU-R, carries out similar functions for radio.

local area network (LAN)

A limited distance network connecting a defined set of terminals. It could connect workstations within an office, offices in a

building, or buildings within a campus.

leased line

A dedicated telephone line for whatever purpose designated by the lessee. Leased lines are capable of higher transmission

speeds for data communications than regular telephone lines, and are often required for large computers with multiple users

connecting simultaneously to the Internet.

line

(a) From a switching viewpoint, the Loop, Station Equipment and Central Office - associated equipment assigned to a

customer. (b) From a Transmission view point , the transmission path between a customers station equipment and a switching

System (also called a Loop). (c) In Carrier Systems, the portion of the transmission system between two terminal locations.

The line includes the transmission media and associated line Repeaters. (d) The side of the Central Office equipment that

connects to the Outside Plant. The other side is called the drop side.

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Cisco AS5800 Specifications Page 307