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.
World''''''''''''''''s Leading VOIP company offering reseller program for UAE,Lebanon,Sudan,Qatar,Kuwait & Saudi Arabia. We have Anti block PC Dialer ,and Anti block Mobile Dialer. we have different VOIP port for direct Pap2 phone.