In the ColdFusion administrator Event Gateways > Gateway Instances
You can have a .cfg file in Gateway Config where you can specify the IP address and Port
#
# SMSGateway configuration file
# Test server config
#
# Type of binding.Value can be either transciever,transmitter or receiver
binding=transciever
# This is the IP address of SMSC
ip-address=102.208.328.100
# Port to bind to
port=80001