US Robotics COURIER Manual de usuario descargar pdf (Pagina 274)

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101

U.S. Robotics I-modem Command Reference

Glossary • Page G-16

data terminal equipment (DTE)

The device that generates or is the Þnal destination of data.

DCE

See data communication equipment.

D-channel

In ISDN BRI, a 16-Kbps channel for call control signaling or for passing packet-mode (for

example, X.25) data. In ISDN PRI

, a 64-Kbps channel for call-control signaling or for

passing packet-mode data. The ÒDÓ stands for Òdelta.Ó

default

Any setting assumed, at startup or reset, by the computer's software and attached devices,

and operational until changed by the user.

digital loopback

A test that checks the modem's RS-232 interface and the cable that connects the terminal

or computer and the modem. The modem receives data (in the form of digital signals)

from the computer or terminal, and immediately returns the data to the screen for veriÞca-

tion.

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