System and method to initiate a presence driven peer to peer communications session on non-IMS and IMS networks

A system for call routing applications, comprising:

• a computer infrastructure being operable to:
• route presence information of a third party from both non-IMS network devices and IMS network devices to IMS compliant presence components;
• route the presence information of the third party received from the non-IMS network devices and IMS network devices to a callee based on configurable preferences provided by the callee and correlated to the presence information on the IMS compliant presence components;
• send charging information for the routing to an IMS compliant charging platform associated with the IMS compliant presence components,
• wherein:
• the configurable preferences specify at least one delivery channel to transmit the presence information of the third party;
• the presence information includes a notification of an availability of the third party on a particular communication channel;
• and
• the particular communication channel is in the IMS network or in the non-IMS network.