Perhaps you should pay someone who knows a little bit about it to set it up for you... ""Li, Ke Cump (Intern)"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > side A 4500 serial port+NT1 PLUS > side B 1603 ISDN BRI port > how can make these 2 routers ISDN connection and ping success > ___________________________________________________ > /\_\ /\_\ /\_\ /\ \ > /:/ / \/_/ /:/ / /::\ \ > /:/ / /\_\ /:/ /_____ /:/\:\_\ > /:/ / /:/ / /:/_______/| /:/ /\/_/ > /:/ / /:/ / /:/| ______| /::\ \ > /:/ / /:/ / /:/ |:|| /:/\:\_\ > \:\ \ \/_/ \/_/|:|| /:/ /\/_/ > \:\ \ e-mail: |_|/ \:\ \ > \:\ \ [EMAIL PROTECTED] \:\_\ > \/_/ \/_/ > ___________________________________________________ > E-mail: [EMAIL PROTECTED] BP China Digital Business > Icq 16841803 Oicq 334407 http://f9811001.yeah.net Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=18069&t=18069 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]