1,8 channel-32 sims gsm gateway 2,IMEI auto rotate 3,Call termination 4,automatic rotate(8ports 32 SIM ... or receive a call in outdoor Locking SIM Card Locking mobile service provider Setting 10 group of ... digits Setting 10 group saliasing Setting dial-updelay time Setting # as a dial out number or ... with 32 sim cards, every port has 4 sim cards for rotation, reduce long calling time of every sim card.