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