Grandstream telefony

GXP2130

Firmware – https://www.grandstream.com/support/firmware
User guide – http://www.grandstream.com/products/gxp_series/general/documents/gxp2130_2140_2160_user_guide.pdf
Administrator guide – http://www.grandstream.com/products/gxp_series/general/documents/gxp2130_2140_2160_administration_guide.pdf
XML Phonebook – http://www.grandstream.com/products/gxp_series/general/documents/gxp2130_40_60_xml_phonebook_guide.pdf