ORPOS and Siebel CRM integration

Hi,

We have both ORPOS 13.3 and also Siebel CRM 8.1.1.4 installed. We need to integrate both ORPOS and Siebel CRM. I am doubtful whether it should be point to point integration or the integration will be through middleware like AIA. I am gone through the Siebel Integration guide of POS. There is no mention about any middleware, that enhances my belief of Point to Point integration. But nowhere i am finding any configuration related to POS by which we can integrate it with Siebel CRM. During installation of ORPOS, we have provided the communication type, authenticity type and the webservice to