A CSU has the ability to loop up a far end CSU or smartjack. When the CSU sends a loop up, the remote CSU or smartjack will go into loop, and you can run testing patterns to that loop. It is used to test the end to end connectivity of a circuit. For instance, lets say you have the following:
CPE--CSU(A)-----Smartjack(A)-------CO----------CO-------Smartjack(B)-------- CSU(B)--CPE If there is no connectivity, you could go to CSU(A) and send a loop code to Smartjack(B) or CSU(B). You would then run a test pattern, say 3:24, to the loop. If the test pattern runs clean, with no errors, then you know that you have a good circuit from one end to the other, and the problem may be with the CPE. On the other hand, if you try to loop the CSU and you can't, then you would try to loop the Smartjack and run to that loop. If you can run clean you know the problem lies somewhere after the Smartjack, if you can't then you would call the carrier and ask them to find out what is wrong with the circuit. Hope that helps. ~-----Original Message----- ~From: somera cecilia [mailto:[EMAIL PROTECTED]] ~Sent: Thursday, February 07, 2002 7:00 PM ~To: [EMAIL PROTECTED] ~Subject: Loop Up [7:34804] ~ ~ ~what does it mean if csu/dsu sends a "loop up" ? how does it affect the ~remote csu/dsu ? ~ ~ ~Report misconduct ~and Nondisclosure violations to [EMAIL PROTECTED] ~ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34805&t=34804 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
