I have a Polycom Soundstation EX plugged into a Cisco ATA-188 which is connected to a Cisco CallManager system. I can get the calls to work as long as I dial the digits in rapid succession on the Polycom unit. If I dial the numbers too slowly, it times out and I receive an error message. I tried the same thing using a regular analog phone instead of the Polycom phone and it works fine whether entering the digits fast or slow. Has anyone run into this problem before with Polycom conference phones and Cisco ATA's?