Intercall is an audio-conferencing service that allows for recurring, ad hoc, or operated-assisted calls between multiple participants. Intercall’s ResPlus product offers pay per minute audio-only conferencing functions and does not require reservations or operators. Intercall also offers an Operator Assisted product that provides vendor-supported moderators for separate leader and participant audio conferencing lines. The Operator Assisted product can be used with any video conferencing tool mentioned on this page.