1. Rackmount 1U height；
2. 8 or 16 channels GSM / CDMA / WCDMA / 4G LTE with 8 or 16 SIM cards per unit;
3. SMS supported;
4. Choice of FXO (PSTN Telephone land line) / FXS;
1. Rackmount 3.5U height；
2. 64 or 96 channels GSM / CDMA / WCDMA / 4G LTE with 64 or 96 SIM cards per unit;
3. SMS supported;
4. Choice of ISDN PRI / E1 and FXO (PSTN Telephone land line) / FXS;
1. Rackmount 1U height；
2. 8 channels GSM / CDMA / WCDMA / 4G LTE with 64 SIM cards per unit;
3. SMS supported;
