SirDice: Yeah that was exactly how I was testing, but it wouldn't work for our situation because the dial string is being fed via a telnet session.
I did however get this to work properly with the US Robotics modem (<3 these things).
Well, after the testing was said and done, it is not a viable solution. The system and initializations and call process take about 30 seconds to complete the dial out. That is simply to long to wait for a viable solution for dialing out of the emergency call center.
I am now writing a "print" driver for the Avaya phone switch that will send the dial string directly into the phone switch.
We shall see how this pans out.
Thank you for all your help and suggestions.