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.
Jivetel, established in June 2005 is a fast paced, highly dedicated communications player. Jivetel is a division of GlobeCom International, a global leader in wireless and voice over ip telephony.