I am going to connect a cable from the telco's chrono directly to the PRI module on the 3640. I need the pinouts for the cable from the chrono to the port.I am using cat5 cable. This is what I have found but I am unsure whether it is correct to use as I don't want to blow the module port. Pinouts Telco Chrono PRI Module DB15 1 TX Tip ----> 9 TX Tip 2 TX Ring ----> 2 TX Ring 4 RX Tip ----> 8 RX Tip 5 RX Ring ----> 15 RX Ring I think this would be 120-Ohm balanced connection. Thanks _________________________________________________________________________ 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]