Streamezzo Workbench Developer offers 2 emulation features:

• Local emulation (Service > Emulate Service): Workbench Developer will act both as a device (Rich Media Client emulator) and a server (Rich Media Server emulator); this mode will be very frequently used during the development phase in order to check the implementation progress and conformance with the requirements.
• Distant emulation (Service > Run Service): Workbench Developer will act only as a device (Rich Media Client emulator) and will request a real Rich Media Server instance; this mode will usually be used after a publication on this Rich Media Server instance, in order to check the deployed application is ok.