?
Solved

What is T1 DSU/CSU used for?

Posted on 2014-10-20
6
Medium Priority
?
228 Views
Last Modified: 2014-10-31
Hi,

I am thinking of purchasing 2 used Cisco routers for my lab and I noticed that on one of the routers, it has a T1 DSU/CSU
and on the other route it has 2 T1 DSU/CSU. I was wondering what these are used for as I've never seen these before? Thanks.
0
Comment
Question by:techin4
6 Comments
 
LVL 8

Expert Comment

by:R_Edwards
ID: 40393573
They are usee to connect terminal equipment
http://en.m.wikipedia.org/wiki/CSU/DSU
0
 
LVL 14

Expert Comment

by:Natty Greg
ID: 40393626
Since you're doing a lab, you may also want to take a read of its application on the Cisco website
http://www.cisco.com/en/US/prod/collateral/routers/ps221/product_data_sheet09186a00801a9184.html
0
 
LVL 50

Accepted Solution

by:
Don Johnston earned 750 total points
ID: 40394348
They are used for connecting to a T1 leased line.  These are 1.5mbp/s services that telco's provide for when you want to connect two geographically separate locations together.

They used to be very common.  Now, not so much.

If you're building a lab for certification, the concept is still taught, but the actual configuration isn't.

If you're getting a good price on the routers, you can simply not use the CSU/DSU modules or you can remove the modules and install other modules.  If you remove them, you may be able to find a buyer for them on eBay and recoup some of the cost.
0
SMB Security Just Got a Layer Stronger

WatchGuard acquires Percipient Networks to extend protection to the DNS layer, further increasing the value of Total Security Suite.  Learn more about what this means for you and how you can improve your security with WatchGuard today!

 

Author Comment

by:techin4
ID: 40398505
Hi Don,

Thanks for your reply. If I remove the modules, what other modules would you recommend for my studying?
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40399069
Depends on what you want to do (and what's available). For example, if you need more LAN ports,  you could get Ethernet modules or Ethernet  switching modules.
0
 
LVL 25

Assisted Solution

by:madunix
madunix earned 750 total points
ID: 40415088
0

Featured Post

[Webinar] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Ready to get certified? Check out some courses that help you prepare for third-party exams.
I’m willing to make a bet that your organization stores sensitive data in your Windows File Servers; files and folders that you really don’t want making it into the wrong hands.
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online) The email signat…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
Suggested Courses
Course of the Month8 days, 3 hours left to enroll

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question