Telsey WAU11n Router Manual PDF (Setup & Configuration Guide)

Home

Manuals

Telsey

WAU11n

Page 151 / 165 Scroll up to view Page 146 - 150

Telsey telecommunications

Glossary

143

MT500--SIEN12

Glossary

Numbers

802.1p/q

- Parts of the 802 protocol, that define the QoS on Layer 2.

802.3

- The IEEE standard for the definition of the CSMA/CD [Ethernet]

medium access method for LANs.

Address-of-Record -

An address-of-record (AOR) is a SIP or SIPS URI that

points to a domain with a location service that can map the URI to another URI

where the user might be available. Typically, the location service is populated

through registrations. An AOR is frequently thought of as the "public address"

of the user.

ADSL

- Asymmetric Digital Subscriber Line: Modems attached to twisted pair

copper wiring that transmit from 1.5 Mbps to 9 Mbps downstream (to the

subscriber) and from 16 kbps upstream, depending on line distance.

ANSI

- American National Standards Institute. An organisation responsible for

coordinating and approving U.S. standards. Standards approved by ANSI are

often called ANSI standards. ANSI is the U.S. representative to ISO.

ASCII

- American Standard Code for Information Interchange. A standard

character-to-number encoding widely used in the computer industry.

ATM

- Asynchronous Transfer Mode: an ultra high speed cell-based data

transmission protocol which may be run over ADSL.

Auto Crossing Port -

When a port is auto crossing, it is not necessary to make

a distinction between straight or cross CAT5 Ethernet Cable.

Autosensing Port -

Network adapters that support both traditional and Fast

Ethernet -- so-called 10/100 adapters -- choose the speed at which they run

through a procedure called autosensing. Autosensing involves probing the

capability of the network using low-level signalling techniques to select

compatible Ethernet speeds. Autosensing was developed to make the migration

from traditional Ethernet to Fast Ethernet products easier.

Page 152 / 165

Telsey

telecommunications

Glossary

MT500--SIEN12

144

Back-to-Back User Agent -

A back-to-back user agent (B2BUA) is a logical

entity that receives a request and processes it as a user agent server (UAS).

In order to determine how the request should be answered, it acts as a user

agent client (UAC) and generates requests.

Unlike a proxy server, it maintains

dialog state and must participate in all requests sent on the dialogs it has

established.

Since it is a concatenation of a UAC and UAS, no explicit

definitions are needed for its behavior.

Bandwidth

- Technically, the difference, in Hertz [Hz], between the highest

and lowest frequencies of a transmission channel. However, as typically used,

the amount of data that can be sent through a given communications circuit.

For example, Ethernet has a bandwidth of 10Mbps.

bps

- bits per second. A measure of the rate of data transmission.

BRI -

ISDN Basic Rate Interface. The common form of ISDN with 2 Bearer

Channels and one D Channel. All three channels are on a single copper pair and

encoded with type 2B1Q coding.

Bridge -

A bridge is a product that connects a local area network (LAN) to

another local area network that uses the same protocol (for example, Ethernet

or token ring). You can envision a bridge as being a device that decides whether

a message from you to someone else is going to the local area network in your

building or to someone on the local area network in the building across the

street. A bridge examines each message on a LAN, "passing" those known to

be within the same LAN, and forwarding those known to be on the other

interconnected LAN (or LANs).

Broadcast

- A packet delivery system that delivers a copy of a given packet to

all hosts attached to the network. For example, Ethernet.

Call Agent

- a.k.a. Media Gateway Controller. Master device in MGCP

architecture.

Central Office (CO)

- is the office of your local carrier (LEC) closest to your

location. Your circuit will be terminated to the CO closest to you and then

connected to the closest Point of Presence (POP) of your chosen ISP.

Codec

- Compression/decompression. Pertaining to adapters that compress

and decompress video files. The letters "CODEC" represent "compression/

decompression"; in the past, they represented "coder/decoder".

Conference -

A multimedia session that constrains multiple partecipants.

CPE

- Customer Premises Equipment [i.e. CPV/CPL]. Equipment that is

installed at customer sites to connect them to the provider's network.

Page 153 / 165

Telsey telecommunications

Glossary

145

MT500--SIEN12

Dialog -

A dialog is a peer-to-peer SIP relationship between two UAs that

persists for some time.

A dialog is established by SIP messages, such as a 2xx

response to an INVITE request.

A dialog is identified by a call identifier, local

tag, and a remote tag.

A dialog was formerly known as a call leg in RFC 2543.

Dialup

- A temporary, as opposed to dedicated, connection between machines

established over a standard phone line.

DHCP

- Dynamic Host Configuration Protocol. TCP/IP protocol that enables PCs

and workstations to get temporary or permanent IP addresses [out of a pool]

from centrally-administered servers.

DMZ -

Demilitarized Zone. It is a computer host or small network inserted as

a "neutral zone" between a company's private network and the outside public

network. It prevents outside users from getting direct access to a server that

has company data.

DNS

- (Domain Name System) is a protocol used to translate Internet domain

and host names (such as www.speedguide.net) to IP addresses. DNS

implements a distributed database to store name and address information for

all public hosts on the Net, assuming IP addresses are statically assigned.

Domain

- A part of the DNS naming hierarchy. Syntactically, an Internet

domain name consists of a sequence of names [labels] separated by periods

[dots], e.g., "machine.company.com".

DSLAM

- Digital Subscriber Line Access Multiplexer: specifically, a device which

takes a number of ADSL subscriber lines and concentrates these to a single

ATM line.

DTMF

- Dual-Tone Multi-Frequency. In telephone systems, multi-frequency

signaling in which a standard set combinations of two specific voice band

frequencies, one from a group of four low frequencies and the other from a

group of four higher frequencies, are used. Although some military telephones

have 16 keys, telephones using DTMF usually have 12 keys. Each key

corresponds to a different pair of frequencies. Each pair of frequencies

corresponds to one of the ten decimal digits, or to the symbol "#" or "*", the

"*" being reserved for special purposes.

Ethernet

- A common, 10Mbps local area network technology invented by

Xerox Corporation at the Palo Alto Research Center. Ethernet is a best-effort

delivery system that uses CSMA/CD technology. Ethernet can be run over

thinwire coaxial cable [10BASE2], thickwire coaxial cable [10BASE5], twisted

pair cable [10BASET], or fibre optic cable.

Firewall -

A firewall is a set of related programs that protects the resources of

a private network from users from other networks. An enterprise with an

intranet that allows its workers access to the wider Internet installs a firewall

Page 154 / 165

Telsey

telecommunications

Glossary

MT500--SIEN12

146

to prevent outsiders from accessing its own private data resources and for

controlling what outside resources its own users have access to. Basically, a

firewall, working closely with a router program, examines each network packet

to determine whether to forward it toward its destination.

FXS

- Foreign Exchange Service. A network-provided service in which a

telephone in a given local exchange area is connected, via a private line, to a

central office in another, i.e., "foreign", exchange, rather than the local

exchange area's central office. A FXS line is normally connected to a standard

telephone, fax or modem.

FTP

- File Transfer Protocol. The TCP/IP standard, high-level protocol for

transferring files from one computer to another over a network. FTP is also

usually the name of the program that the user invokes to execute the protocol.

Gateway

- A device linking two different types of networks that use different

protocols [for example, between the packet network and the Public Switched

Telephone Network].

Gatekeeper

- A gatekeeper identifies, controls, counts, and supervises the

traffic or flow through the network. It also provides functions such as terminal

and gateway registration, address resolution, band-width control, and

admission control.

H.323

- An umbrella standard for audio/video conferencing over unreliable

networks; architecture and procedures are covered by this standard; H.323

relies on H.225 and H.245.

Header -

A header is a component of a SIP message that conveys information

about the message.

It is structured as a sequence of header fields.

Home Domain -

The domain providing service to a SIP user. Typically, this is

the domain present in the URI in the address-of-record of a registration.

ICMP

- Internet Control Message Protocol. The TCP/IP protocol used to handle

errors and control messages at the IP layer. ICMP is part of the IP protocol.

Gateways, routers and hosts use ICMP to send reports of problems about

datagrams back to the original source that sent the datagram.

IGMP

- Internet Group Management Protocol. Protocol used to dynamically

IEEE

- Institute of Electrical and Electronics Engineers. A standard-making

body in the U.S. responsible for the 802 standards for local area networks.

Page 155 / 165

Telsey telecommunications

Glossary

147

MT500--SIEN12

Invitation -

An INVITE request.

-Internet Protocol. The network layer protocol for the TCP/IP protocol suite.

It is a connectionless, best-effort packet switching protocol.

IP address

- A 32-bit address assigned to hosts using TCP/IP. The address

specifies a specific connection to a network, not the host itself.

IPsec -

IP security. It is the Internet standard protocol for tunneling,

encryption and authentication.

ISDN

-Integrated Services Digital Network. A technology which combines voice

and digital network services in a single medium, making it possible for

telecommunications providers to offer customers digital data services as well

as voice connections through a single "wire". The standards that define ISDN

are specified by CCITT.

ISO

- International Organisation for Standardisation. An international body

that develops standards in many areas, including network protocols. It is best

known for the seven-layer OSI [Open Systems Interconnection] suite of

network protocols.

LAN

- Local Area Network. Any physical network technology [such as Ethernet]

that operates at high speed [typically 10 Mbits per second or more] over short

distances [up to a few kilometres].

LED

- Light Emitting Diode. A luminous indicator.

Location Service -

A location service is used by a SIP redirect or proxy server

to obtain information about a callee's possible location(s).

It contains a list of

bindings of address-of-record keys to zero or more contact addresses.

The

bindings can be created and removed in many ways; this specification defines

a REGISTER method that updates the bindings.

Loop -

A request that arrives at a proxy, is forwarded, and later arrives back

at the same proxy.

When it arrives the second time, its Request-URI is

identical to the first time, and other header fields that affect proxy operation

are unchanged, so that the proxy would make the same processing decision on

the request it made the first time.

Looped requests are errors, and the

procedures for detecting them and handling them are described by the

protocol.

MAC

- Media Access Control. The lower portion of the data link layer. The MAC

differs for various physical media.

MAC address

-The hardware address of a device connected to a shared media.

For example, the MAC address of a PC on an Ethernet is its Ethernet address.

Media Gateway Controller

- See Call Agent.

Rate

Popular Telsey Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share