6c. Gateways for GSM network
GSM Gateways help to connect the mobile network (using a GSM SIM card) to a landline type telephone or EPABX/KTS system. Outward calls from an EPABX can be made through a GSM network, to take advantage of the reduced mobile-to-mobile call rates. GSM gateways are also useful in cases where the GSM network is “not reachable” within some premises. The GSM gateways can be installed near the windows, where the signal is strong, and a wired connection can be taken inside on a landline type phone.