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.
A Tel team will have the pleasure to be in contact with your revered company, aiming to start a mutually rewarding business relationship!
Looking forward to hear from you soon on sales@atelecommunication.com.