单项选择题
A.shared
B.overlaid
C.dual-line
D.dual-label
E.single-line
F.dual-number
单项选择题 TheVBBCompanywantstofindoutwhichsetofprogresstonesandcadencesaresupportedwithitslocalCiscoUnifiedCallManagerExpressservice.Whichcommandshouldbeused?（）
单项选择题 TheNeilsonFarmhastried,withoutsuccess,tousebothCiscofaxrelayandT.38faxingserviceswithCiscoUnifiedCallManagerExpress.Theonlyfaxingservicethatseemstoworkisfaxpass-through.Whichporttypeisconnectedtotheirfaxdevice?（）
单项选择题 Which ephone-dn type does the exhibit represent? （）
