Integrated Services Digital Network (ISDN)
Use of ISDN D
Channels
The D channel uses a protocol standardized by the International
Telegraph and Telephone Consultative Committee (CCITT) for
setting up D Channel connections. The D channel can also be
used for low-speed packet transmission.
Audio Capabilities
Audio Overview
The system features telephone-quality audio input and output
capabilities. Port pinouts for the audio jack on the system unit
are provided in Appendix B.
DECsound
Application
Systems shipped with the OpenVMS AXP operating system
include the DECsound application as part of the DECwindows
Motif software package. DECsound is an easy-to-use software
application that lets you play back recorded messages, record
audio messages, mail recorded messages, and include recorded
messages in compound documents.
1–10 Introduction to Your System
