Atcom EX20B Extension Module

EX20 is an expansion module for the Atcom AT-840 and supports 20 function keys

Features

• Supports BLF, Speed Dail, DND, Directory, Redail, Call Transfer, Call Forward, Call History Details
• No need for extra power supply. Powered by AT-840 directly
• 20 Keys for each EX20
• Each AT840 supports a maximum of 2 EX20