SIPREC is a SIP protocol for call recording, based on IETF standards, and it is used for establishing an active recording session and reporting the metadata of the session.
OrecX supports open source SIPREC recording for many telephony platforms:
Offers business VoIP providers easier call recording system deployment, concurrent call capture, and auto-provisioning of customer interaction data. Customers require call recording for various needs, and service providers can generate a new revenue stream by offering it to them, quickly and affordably. Today, OrecX arms over 100 service providers with open source SIPREC Recording.