Chapter 32. Isdn; Overview - Samsung Ubigate iBG3026 Configuration Manual

Ubigate iBG3026 Configuration Guide
CHAPTER 32. ISDN

Overview

Integrated Services Digital Network(ISDN) is composed of data service and
telephone service provided by telephone carrier. Since ISDN includes
digitalization of telephone, it can transmit voice, data, text, graphic, music,
video and data transmissible by various telephone line. The appearance of
ISDN enables standardizing subscriber service standard, user network
interface, the capacity of network and inter-network. ISDN application can
provide services such as image, telephone, transmission of high-capacity file
and videoconference at high speed.
This section briefly introduces ISDN service.
Services
BRI Service
BRI(Basic Rate Interface) service possesses two B channels and one D
channel, which is composed of Two B channels and One D channel(2B+D).
BRI B-channel service is operated with 64 Kbps and this means User data.
BRI D-channel service is operated with 16 Kbps, transmitting signal
information and management information. According to OSI reference model,
D CH ranges from Layer1 to Layer3. BRI is made up of 192 Kbps.
The BRI physical layer specification is International Telecommunication
Union-Telecommunications Standards Section(ITU-T)(formerly the
Consultative Committee for International Telegraph and Telephone [CCITT])
I.430.
537
© SAMSUNG Electronics Co., Ltd.