I'm having a problem with static coming and going on my PRIs. The effect then is that users are unable to temporarily dial in - the modems aren't able to negotiate a connection. I'm fairly certain the interference is being produced on the utp cat 5 cable running about 25 feet on a ladder rack from the demarc point to my boxes. I'm planning on installing shielded cable immediately but was wondering if anyone has run into similar problems and has some advice? What is the best way to measure the noise on the line? I noticed under Performance Monitor on modems you can get s/n ratio info for each connection. What are acceptable levels? Thanks, Chris Hanes - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.