The Parameter for the service can be concated to the Service URL. For example World Clock is a IP Phonoe Service and have a parameter called City. The URL for the service can be as follows:
http://ServerIP/PhoneServices/WorldClock.asp?City=London
In the ASP application the supplied parameter value can be obtain with the help of Request.QueryString("City").
As per my knowledge, as such there is no directway to provide service parameter along with the service URL in AXL API.
Though the concated mechanism is not updating the telecastersubscribedparameters table of Cisco Call Manager, it can serve the purpose.
Thanks
Panigrahy