- www.wirelesscallsystems.net
- Address:Cihangir Mah. Kirazli CAD. Kalem Sok. No: 26 Avcilar
- ARG ELECTRONICS LTD.
- Address:KUCUKYALI AYDINEVLER. PREVEZE SK 21 / 4
- Global Teknoloji Ltd.
- Address:UphillTowers B119 Bati Atasehir
- GPS Industry Company Ltd.
- Address:Konak Mevki. 18 / 1
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