The Grandstream GBX20 Extension Module adds flexibility and convenience to the Grandstream GRP2615 and GXV3350 IP Phones. The GBX20 module adds features that are ideal for businesses managing high cal..

The GXP2200EXT is a backlit LCD extension module supported by the GXP2140, GXP2170 and GXV3240. The module includes 20 dual-colored extension keys and 2 arrow keys for page switching (allowing each GX..