Điện thoại Grandstream GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, GXP1630, GXP1450, GXP2130, GXP2135, GXP2140, GXP2160, GXP2170, GXP2200 ext, HS108, GRP2612, GRP2612P, GRP2613, GRP2614, GRP2615.
