A n optional "1 -to-2 " jac k adapter devic e (s plitter) is required to c onnec t both a telephone and modem line to your c omputer.
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1 0 0 0 BA SE -T X E thernet c apability is available on c ertain c omputer models . See your c omputer's s pec ific ations s heet for details on its hardware