Hi all, Need the groups advice. The network consists of two 1605 routers with 128k ISDN connections in a transparent bridge environment. This network suffers from lockups often,however, not consistently. Yesterday, speaking with a user, he asked me a question. The question was, "Why is it when I send a JPEG file to a user located across the ISDN link, the network come to a halt?". I told him that if the JPEG was very large in size ex. 2MB, when it has to cross the ISDN link, its like trying to squeeze a lemon(a small one) into a pop bottle(maybe not a good example, but that is all I could think off). This saturates the ISDN link which is only 128k. Am I correct in my explanation? What would be a good explanation? I am not comfortable with my explanation(maybe I am wrong). I look forward to hearing the groups thoughts, as well as any solutions(change to routing, QOS, etc.) TIA KM _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=3720&t=3720 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]