ADTRAN 1200214L1 Especificaciones descargar pdf (Pagina 168)

Appendix D. Glossary

D-10 IQ Probe User Manual 61200214L1-20

SDLC

Synchronous data link control. A link-level communications protocol

used in an IBM systems network architecture (SNA) network that

manages synchronous, code-transparent, serial information transfer

over a link connection. SDLC is a subset of the HDLC protocol devel-

oped by ISO.

service

The provision of telecommunications to customers by a common car-

rier, administration, or private operating agency using voice, data,

and/or video technologies.

SNA

Systems network architecture. The IBM protocol group which gov-

erns mainframe communication.

SNMP

Simple network management protocol. A control and reporting

scheme widely used to manage devices from different vendors.

SNMP operates on top of the internet protocol.

Data set ready. A signal on the DTE interface that indicates if the

communications is connected and ready to start handshaking control

signals so communications can begin.

statistical multiplexing

Interleaving the data input of two or more devices on a single chan-

nel or access line for transmission through a frame relay network.

Interleaving of data is accomplished using the DLCI.

switched network

The network of dial-up telephone lines using circuit switching to pro-

vide communications services to network users.

synchronizing bits (sync bits)

A fixed pattern in synchronous transmission used to identify the

boundaries of frames.

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ADTRAN 1200214L1 Especificaciones Pagina 168