1. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
Switched 56K
Last Update
1.2.0
Copyright Kenneth M. Chipps Ph.D.

2. Objectives of This Section
Learn
What Switched 56K is
Where Switched 56K is used
Copyright Kenneth M. Chipps Ph.D.

3. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
Context
Layer 1
Network Type
WAN
Copyright Kenneth M. Chipps Ph.D.

4. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
What is Switched 56K
Switched 56K which is also called DSA – Digital Switched Access is a fully digital old style dial backup line
As a dialup line, the user only pays for the time used
It is rarely used anymore
But some are still in place I assume
A slow speed circuit
Copyright Kenneth M. Chipps Ph.D.

5. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
Operation
This line operates as a standard digital data circuit just like a T1 line
It is often just a channel out of a T1 circuit
We will cover its operation there
Copyright Kenneth M. Chipps Ph.D.

6. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
Speeds
The only speed is 56Kbps
Copyright Kenneth M. Chipps Ph.D.

7. Copyright 2000-2010 Kenneth M. Chipps Ph.D. www.chipps.com
Current Use
I doubt there is any current use
In the past it connected small sites to a collection node to send small amounts of data on an intermittent basis
Copyright Kenneth M. Chipps Ph.D.