The addition of button modules allows the phone to support additional programmable buttons.
Do not connect or disconnect a button module yourself. Your system administrator will arrange this if necessary. Failure to connect and restart the equipment in the correct order may cause the phone and or the button module to function incorrectly.
The button modules are powered via the phone. Button modules can be powered by a phone using Power over Ethernet (PoE), this changes the phone from a Class 1 to a Class 2 device. However, to support more than two button modules, the phone must be powered by a J100 mains power supply unit rather than by PoE.
There are 2 types of button module, JEM24 and JBM24. The different types cannot be combined on the same phone.
Each JEM24 has 24 dual-LED buttons with adjacent button label display. The button LED’s are used to indicate the status of the button feature whilst pressing the button is used to access the feature.
The modules automatically match the display settings of the phone to which they are connected (color with J179 or greyscale with J169, font size, background image, screen saver).
Both the J169 and J179 telephones can support up to 3 JEM24 button modules.
A single JEM24 supports 72 programmable button slots. These are arranged in 3-pages, with pages accessed using the module's page scroll button. When in 3-page mode, there is no indication of when programmed button slots not on the page being displayed are altering.
When multiple modules are connected to a phone, each module only supports a single page of 24 programmable button slots.
A J189 can support up to 2 JEM24 button modules.
Each module provides the phone with an additional 24 programmable button slots in a single page. That is, the first module shows buttons 49 to 72, the second buttons 73 to 96. The page scrolling buttons on the modules are disabled.
Both the J169 and J179 telephones can support up to 3 JBM24 button modules. Each module provides the phone with 24 additional programmable buttons.
Each button has a 13 character display for the button label plus an adjacent dual-LED button. The button LEDs are used to indicate the status of the button feature whilst pressing the button is used to access the feature.