1,8 channel-32 sims gsm gateway 2,IMEI auto rotate 3,Call termination 4,automatic rotate(8ports 32 SIM cards) 5, ... dial tone and make a call 2.3, SKYLINE 8 Ports GSM FWT is RJ-11 of FXS/FXO ... line phones or system. 3,The Parameters Of SKYLINE 8 Ports GSM FWT 4, For Public phone system and ... can avoid blocking sim cards totally. B, 8 ports with 32 sim cards, every port has 4 sim cards for rotation, reduce ...