SAP PO as ESB to connect to SAP HANA and non SAP System

Hello,

I would like to know how feasible is SAP PO to be used as an ESB to connect to SAP HANA and non SAP systems (Salesforce, Oracle ERP ) ? Does it provide any connector to connect to Oracle or Salesforce as well ? Can we do real time calls with ERP's other than SAP ? How is the performance of SAP PO ?

Any document link that can help me understand below questions ?

Thanks,
Vinit Pugaliya