單項(xiàng)選擇題CE與164骨干設(shè)備或城域網(wǎng)設(shè)備之間增加()防火墻設(shè)備。

A.包過(guò)濾
B.狀態(tài)檢測(cè)
C.應(yīng)用代理
D.百兆


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1.單項(xiàng)選擇題CDUtypesusedwithRBS2207()

A.CDU A and CDU G
B.CDU F and CDU G
C.CDU A and CDU C
D.CDU F and CDU C+

2.單項(xiàng)選擇題CDMA中283頻點(diǎn)的中心頻率是()

A.833.49MHz
B.832.26MHz
C.833.51MHz
D.823.49MHz

3.單項(xiàng)選擇題CDMA占用的載頻上行和下行各為()

A.825MHz-835MHz 870MHz-880MHz
B.815MHz-825MHz 860MHz-870MHz
C.815MHz-825MHz 870MHz-880MHz
D.825MHz-835MHz 860MHz-870MHz

4.單項(xiàng)選擇題CDMA語(yǔ)音業(yè)務(wù)信道編碼一般采用()

A.TURBO編碼
B.香農(nóng)編碼
C.卷積編碼
D.SBC子帶編碼

5.單項(xiàng)選擇題CDMA語(yǔ)音信令流程正確的是()

A.originationmessage→BSACK→TCHpreamble→Channelassignmentmessage→BSACK→MSACK→ServiceConnectmessage→Serviceconnectcompletion→assignmentcomplete
B.originationmessage→BSACK→ServiceConnectmessage→TCHpreamble→BSACK→MSACK→Channelassignmentmessage→Serviceconnectcompletion→assignmentcomplete
C.originationmessage→BSACK→Channelassignmentmessage→TCHpreamble→BSACK→MSACK→ServiceConnectmessage→Serviceconnectcompletion→assignmentcomplete
D.OriginationMessage→CMServiceRequest→TchPreamble→Establish→AssignmentComplete→Allocation;