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.
(TGLA)Telegestiones Latinoamericanas is a 100% Spanish company that in recent years, has been providing integrated telecommunications solutions to leading companies in different economic sectors in Latin America, North America and Europe