USB 2.0 8 ports GSM modem pool 1.8 Ports Modem Pool - USB with wavecom module 2.Send ... receive SMS, MMS, e-mail and data Max 8 Ports Modem Pool - USB with wavecom module GSM/GPRS: 900 ... independence, support for the size of SIM card; 3,ports support hot-swapping; 4,a separate module can be ... independence, support for the size of SIM card; 3,ports support hot-swapping; 4,a separate module can be ...