IT Employment

General discussion

Gravatar
0 Votes
Locked

ISDN

By tyya44 ·
could sonmeone please give me an explanation on what ISDN is.

This conversation is currently closed to new comments.

Thread display: Collapse - | Expand +

All Comments

gravatar
Collapse -

Digital Line

by TheChas In reply to ISDN

ISDN is a first generation 'high' speed digital data line.

From the PCWebOPedia

Abbreviation of integrated services digital network, an international communications standard for sending voice, video, and data over digital telephone lines or normal telephone wires. ISDN supports data transfer rates of 64 Kbps (64,000 bits per second).
There are two types of ISDN:

Basic Rate (BRI) ISDN -- consists of two 64-Kbps B-channels and one D-channel for transmitting control information.
Primary Rate ISDN -- consists of 23 B-channels and one D-channel (U.S.) or 30 B-channels and one D-channel (Europe).
The original version of ISDN employs baseband transmission. Another version, called B-ISDN, uses broadband transmission and is able to support transmission rates of 1.5 Mbps. B-ISDN requires fiber optic cables and is not widely available.

Chas

gravatar
Collapse -

On a Side note

by road-dog In reply to Digital Line

ISDN Never did live up to it's potential, especiallly since DSL and cable provide greater speed at less cost.

I see ISDN most often as a backup scenario these days....

ISDN also stands for:
It Still Doesn't Network
Innovations Subscribers Don't Need
I Spend Dollars Needlessly

Back to IT Employment Forum

Start or search

Related Discussions

Related Forums