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.
The group (ANWAR NAJD) was established in 1978 as a supplier and installer of power transmission line. In 1987 we have entered the IT market as a system builder and a retailer under the name BITCOM.