Multitech PROXYSERVER MTPSR1-120 Guía de usuario descargar pdf (Pagina 71)

Glossary

Foreign Exchange Station (FXS): See FX, FXO. To generate a call from the computer telephony system to the POTS

set, an FXS connection must be configured.

Forward Explicit Congestion Notification (FECN): A bit that tells you that a certain frame on a particular logical

connection has encountered heavy traffic. The bit provides notification that congestion-avoidance procedures should

be initiatedin the same direction of the received frame. See also BECN (Backward Explicit Congestion Notification).

Frame: A group of data bits in a specific format to help network equipment recognize what the bits mean and how to

process them. The bits are sent serially, with a flag at each end signifying the start and end of the frame.

Frame Relay: A form of packet switching that uses small packets and that requires less error checking than other

forms of packet switching. Frame relay is effective for sending “bursty” data at high speeds (56/64K, 256K, and 1024K

bps) over wide area networks. Frame Relay specifications are defined by ANSI documents ANSI T1.602, T1.606,

T1S1/90-175, T1S1/90-213, and T1S1/90-214. In using frame relay, blocks of information (frames) are passed across a

digital network interface using a “connection number” that is applied to each frame to distinguish between individual

frames.

Frame Relay Forum: A non-profit organization of 300+ vendors and service providers, based in Foster City, CA, that

are developing and deploying frame relay equipment.

Frame Relay Implementors Forum: A group of companies supporting a common specification for frame relay

connection to link customer premises equipment to telco network equipment. Their specification supports ANSI frame

relay specs and defines extensions such as local management.

Frame Relay Access Device (FRAD): A piece of equipment that acts as a concentrator or frame assembler/

dissassember that can support multiple protocols and provide basic “routing” functions.

Gateway: 1. A functional unit that interconnects two computer networks with different network architectures. A gateway

connects networks or systems of different architectures. A bridge interconnects networks or systems with the same or

similar architectures. 2. A network that connects hosts.

Graphical User Interface (GUI): A type of computer interface consisting of a visual metaphor of a real-world scene,

often of a desktop. Within that scene are icons, representing actual objects, that the user can access and manipulate

with a pointing device.

Handshaking: A process that two modems go through at the time of call setup to establish synchronization over the

data communications link. It is a synchronization and negotiation process accomplished by the exchange of

predefined, mutually recognized control codes.

High-level Data Link Control (HDLC): An ISO standard, bit-oriented data communications protocol that provides

nearly error-free data transfers.

Hexadecimal: A base 16 numbering system used to represent binary values. Hex uses the numbers 0-9 and the letters

A-F: usually notated by an “h” (e.g., “4CF h”, read “four charley fox, hex”). The result is that one hex digit represents a

4-bit value.

Implicit congestion management: A method of informing the terminal that the network is busy. This method relies on

the end-system protocol to detect and fix the congestion problem. (TCP/IP is an example of a protocol using only

implicit congestion management.) See also “explicit congestion management”.

In-band: Refers to the type of signalling over the conversion path on an ISDN call. Contrast “out-of-band”.

Insufficient Ones: A T1 error condition that is logged when fewer than one 1 in 16 0s or less than 12.5 % average 1s

density is received.

Inter Exchange Carrier (IEC): The long distance company (LE) who’s central office provides the point of reference for

T1 access. Any common carrier authorized by the FCC to carry customer transmissions between LATAs.

Internet: Refers to the computer network of many millions of university, government and private users around the

world. Each user has a unique Internet Address.

Internet Address (IP Address): A unique 32-bit address for a specific TCP/IP host on a network. Normally printed in

dotted decimal format (e.g., 129.128.44.227).

Internet Protocol (IP): A protocol used to route data from its source to its destination in an Internet enviroment. The

Internet Protocol was designed to connect local area networks. Although there are many protocols that do this, IP

refers to the global system of interconnecting computers. It is a highly distributed protocol (each machine only worries

about sending data to the next step in the route).

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 79 80

Comentarios a estos manuales

Sin comentarios

Multitech PROXYSERVER MTPSR1-120 Guía de usuario Pagina 71

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Multitech PROXYSERVER MTPSR1-120