SAP PI Initiates Proxy

Hi Experts,

We are currently on SAP PO 7.4. I have an interface from ECC(proxy ) to PI to External File server which is a simple Async scenario.Our ECC team is requesting PI to initiate the Proxy call instead of them scheduling a job in ECC. Is this a feasible service? Can PI initiate the Proxy call without any request coming into the system.

Please help with possible solutions. Appreciate the help!!

Thank you!!