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Ritron has manufactured and currently manufacturers a line of wireless intercoms known as the Ritrom Jobcom Base Station or Ritron Jobcom Wireless Intercom. One such example in the series is the Ritron JBS-446D Jobcom Base Station/Wireless Intercom (UHF). Ritron has manufactured and currently manufacturers a line of wireless intercoms known as the Ritrom Jobcom Base Station or Ritron Jobcom Wireless Intercom. One such example in the series is the Ritron JBS-446D Jobcom Base Station/Wireless Intercom (UHF). The units are advertised as Jobcom Jobsite Communications devices. In the current production models the JBS series does not work with trunked systems. It is believed that prior to the introduction of the Patriot series, certain Jobcom labeled models were compatible with trunked systems and that the Patriot label was later introduced to help distinguish capabilities. *JBS-446D - 10 channel UHF model with LED display.*JBS-446D ... 10 channel UHF model with LED display.*JBS-450 ... 2 channel UHF model no display (460-470Mhz)[[File:jobcommodelsgraphic2clr.gif]]==Technical=====Programming===You do NOT use programming software nor a special cable. Programming is performed from the stand alone unit itself. You cannot enter a custom frequency. You must select a frequency from a preset table of available frequencies.[[File:jobcomprogrammode.gif]]===Z Button===Some models have a "Z" button. The Z button is a programmable softkey meaning it can be set to do the function you choose such as quick access to specific programmable radio features e.g. Call Tone, DTMF Encode, (Two-Tone Encode coming soon), NOAA Weather Scan, Channel Monitor, Channel Scan.===UHF Trunking===The new Patriot series supports trunked radio systems; UHF Trunking (LTR or PassPort protocols) version.==Related== Ritron Inc. 505 W Carmel Dr Carmel IN 46032Detail on these units is sketchy. As information is obtained it will be provided here. Updates.