Abstract: A system comprising: at least one hardware processor; and a non-transitory computer-readable storage medium having stored thereon program code, the program code executable by the at least one hardware processor to: receive, by an over-the-top (OTT) network server, from an OTT terminal application (OTA), a request to establish voice communication with a known external service; access, by said OTT network server, a database which comprises at least one routing option associated with said known external service; select, by said OTT network server, one of said routing options for establishing said voice communication; and establish said voice communication with said known external service using said selected routing option.