Check. http://www.cisco.com/warp/public/471/75.html Martijn Hi All I am wondering if you can connect 2 1602 56k dsu/csu ports together back-to-back and if you can what would be the pin-out. Thanks quackenbush _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]