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Grandstream, GXP Series Basic, Mid-Range & High-End IP Phones
Expansion Module – GXP2200EXT
Connects to GXP2170 & GXP2140 IP Phones and GXV3240 Video IP Phone
40 extensions per module with 2 page swtich keys
Daisy chain up to 4 models for a total of 160 extensions (20 per page)
128 x 384 graphic LCD display
Local GUI: Multiple line/call appearances
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