Extension Modules
Take your IP Phones to the next level
With Grandstream expansion modules, you can monitor up to 160 extensions per BLF and configure speed dialing on supported models.
GXP2200EXT
Extension Module
Used with the GXP2140, GXP2170, GXV3240
40 contacts per unit, up to 4 units per phone, 160 total extensions
2 arrow keys for page switching
Large LCD with bi-colored BLF LED
Powered by host phone
GBX20
Extension Module
Used with the GRP2615 and GXV3350
20 per page (each module contains 2 pages, for up to 40 lines per module, up to 160 with 4 daisy-chained modules)
4.3 inch (272x480) TFT color LCD
Powered by host phone; when 2 or more GBX20 are connected, the included 12V/1A PSU will power them