GXW4501/4502/4504 ISDN E1/T1/J1 Digital VoIP Gateway-ek - Új
http://www.grandstream.com/sites/default/files/Resources/datasheet_gxw4500_series_english.pdf |
GXW4501/4502/4504 ISDN E1/T1/J1 Digital VoIP Gateway-ek - Új
http://www.grandstream.com/sites/default/files/Resources/datasheet_gxw4500_series_english.pdf |