Eurotech BRI ISDN Manuel d'utilisateur télécharger pdf (Page 93)

Am186™CC Microcontroller Router Reference Design User’s Manual

E-1

Appendix E

Glossary of Terms

2B+D - Describes the BRI configuration for ISDN of two bearer channels and one

D channel.

2B1Q - Two binary, one quaternary, data format for the U-interface. One quaternary

symbol (±3, ±1) represents two bits.

10BaseT Ethernet - A popular type of Ethernet network using twisted-pair cable

and RJ-45 connectors. (See RJ-45.)

B Channel - Bearer channel, 64kbps voice/data channel for ISDN.

bps - Bits per second.

BRI - Basic Rate Interface. The simple 2B+D access method defined by CCITT

recommendation I.430.

CCITT/ITU - International Telegraph and Telephone Consultative Committee /

International Telecommunications Union. ITU is an agency of the UN. CCITT is

a committee of the ITU which makes recommendations for network

communications.

C.O. - Central Office.

CPE - Customer Premises Equipment. Devices such as the NT1, designated to be

the customer's responsibility to provide.

D Channel - 16-Kbit/s channel used to carry out-of-band network signaling or

packet-mode user data. (Refer to the ITU standards found at www.itu.ch.)

DSLAC - A single device containing two SLACs. (See SLAC.)

DTMF - Dual Tone Multi Frequency - An audio signal containing two distinct

tones used for “touch-tone” telephone dialing and signalling.

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