Integrated Services Digital Network (Isdn) - Digital Equipment DEC 3000 500X AXP Owner's Manual

Integrated Services Digital Network (ISDN)

Note: ISDN Not Though your DEC 3000 Model 500X AXP system can provide
Yet Available ISDN capabilities, they are not yet agency approved or available.
Currently, a plug has been placed in the ISDN port pending
approval of ISDN licenses. Once agency approval of ISDN for the
DEC 3000 Model 500X AXP system has been granted, you will
be contacted by your Digital sales representative to inform you of
the ISDN certification. At that point, you must remove the plug
from the ISDN port before connecting the ISDN network.
The following information explains the ISDN capabilities for your
DEC 3000 Model 500X AXP system pending license approval.
ISDN is a digital telecommunications network, providing
ISDN
Capabilities connectivity for voice and data applications.
Your DEC 3000 Model 500X AXP system includes an ISDN Basic
Rate S/T interface, which includes:
•
•
The B channels can be used for digitized voice and circuit-
Use of ISDN B
switched data at up to 64 kilobits per second, or for packet-
Channels
switched data transmission.
Use of ISDN D The D channel uses a protocol standardized by the International
Telegraph and Telephone Consultative Commiittee (CCITT) for
Channels
setting up these connections. The D channel can also be used for
low-speed packet transmission.
Integrated Services Digital Network (ISDN)
two 64 kilobits per second B channels
one 16 kilobits per second D channel
Introduction to Your System 1–9