Hello. I have a NM-2CE1B. But what i rent is unbalance E1. I saw in the CISCO Document CD that "Jumpers on CE1/PRI modules can be used to connect or disconnect receive shield to ground. (See Table 8-1.) The default setting for balanced, 120-ohm CE1/PRI-B modules disconnects receive shield to ground. The default setting for unbalanced, 75-ohm CE1/PRI-U modules connects receive shield to ground. If you are experiencing ground loop problems with E1 cabling, you may want to try changing the jumper settings for the module. " But after i set the jumper, it does not work yet. After i change to NM-2CE1U, it work fine. So i have a question: The different between NM-2CE1B and NM-2CE1U is not only the jumper setting, is it right? Thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=2012&t=2012 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
