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Plantronics APD-80 EHS Electronic Hookswitch Adapter for NEC DT820, Grandstream GXP 1610, GXP1615, GXP1620, GXP1625, GXP1628, GXP1630, GXP1760, GXP1780, GXP1782, GXP2124, GXP2130, GXP2135, GXP2140, GXP2160, GXP2170, GXP2200, GXP3240, GXP3275, ShoreTel ...
User manual Grandstream GXP2124 (English - 71 pages)
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User manual Grandstream GXP2120 (English - 77 pages)
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