Grandstream GBX20 Expansion Module VoIP Adapters providing an ultra-lightweight design

providing an ultra-lightweight design

3" color display

it supports up to 10 SIP accounts and 20 simultaneous calls

all without compromising mobility

and much more

Grandstream GBX20 Expansion Module VoIP Adapters providing an ultra-lightweight designThe Grandstream GBX20 is a programmable key expansion module built for receptionists and high call volume users who need to manage more lines than a standard phone display allows. It attaches directly to compatible Grandstream desk phones. Features include: 4. 3" color LCD with 20 keys per page Up to 40 contacts per module, 160 with 4 daisy chained modules BLF, call park pickup, and speed dial support Powered through the host phone Automatic firmware