A phone can only be used on a network if it supports the correct band(s). Quad-band usually refers to a phone using GSM technology. A quad-band GSM phone is one that can be used for basic service ...
It includes an end-to-end GSM-R solution (radio and core network including NetAct, Messaging and diverse third-party products), an IP-MPLS core network, security, and DWDM technology for the ...
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