The PS4001 power supply supplies four isolated channels of intercom system phantom power to down line components. The PS4001 may be combined with an ES4000A expansion station to create additional intercom channels when using a US2002/PS2001L or US2000A/SPS2001 master station configuration. The PS4001 can also be used as a stand-alone power supply to provide power to four independent party-line channels. Rackmountable in a variety of modular configurations with one of several optional rack-mount kits.

The PS2001L power supply supplies two isolated channels of intercom system phantom power to down line components. Intercom power channels may be combined via the Combine/Isolate switch to form a single intercom power channel with double the capacity of large party-line applications. The PS2001L may be combined with a US2002 user station to create a two-channel master station configuration or as a stand-alone power supply. The resultant master station would be a headset only station, as the PS2001L does not have an integrated speaker. Rack-mountable in a variety of modular configurations with one of several optional rack-mount kits.

The SPS2001 has all of the features of the PS2001L, but adds the power of a built-in speaker and level control for monitoring intercom lines. The SPS2001 may be used as a stand-alone power supply and monitor box or in combination with a US2002 to create a two-channel headset or speaker/mic master station (optional MCP90-0, MCP90-8, MCP90-12, and MCP90-18 panel-mount microphone required). Like the PS2001L intercom power channels, it may be combined via the Combine/Isolate switch to form a single intercom power channel with double the capacity of large party-line applications. Rackmountable in a variety of modular configurations with one of several optional rack mount-kits.

The Telex Audiocom model PS-1F power supply mounts in a standard two-gang electrical outlet box. It may be used to power a single intercom channel containing up to four beltpack headset stations.