TELEDYNAMIC EXP43 T4U Phone Expansion Module

Add visible, one-touch control for extensions, contacts, call-transfer targets, and phone functions on compatible T4U series desk phones. The EXP43 places assignments on a 4.3-inch color display beside 20 illuminated programmable keys. Three selectable pages provide up to 60 programmable DSS keys from one module, giving reception desks, operators, assistants, and call-handling staff a larger key field without moving routine actions into on-screen menus. The module connects as a companion control surface to a compatible T4U phone rather than operating as a standalone desk phone. Each key can be assigned through the phone’s supported key configuration options, allowing users to identify monitored extensions and common call targets at a glance. Dual-color key LEDs provide visual status indication for applicable configured functions, helping staff distinguish active and available monitored resources during call handling. YEA-EXP43 is the ordering code for the EXP43 T4U expansion module. Its 20 physical keys and three-page interface distinguish it as a high-density add-on for deployments where a standard phone key layout is insufficient. Compatible T4U phones can support up to three connected expansion modules, allowing a single desk position to scale to as many as 180 programmable keys when the phone and installation require a larger monitored-extension or speed-dial layout.