User manual for the GXP1400 voip phone:
http://www.grandstream.com/sites/default/files/Resources/gxp21xx_14xx_usermanual_english.pdf
User manual for the GXP1400 voip phone:
http://www.grandstream.com/sites/default/files/Resources/gxp21xx_14xx_usermanual_english.pdf
Neem contact met ons op!