By using Portech SBK-32 expander for 32 SIM-cards, you can increase the number of channels in the Portech MV-37X GSM VoIP gateway series using the Internet.
Telekom Srbija
Telekom Srbija" a.d. with its head office in Belgrade, Takovska 2, was incorporated as a joint stock company in June 1997. In direct sale, 49% of share capital worth DEM 1.568 billion was privatized - 29% was purchased by Italian STET and 20% by Greek OTE
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