A.GEM Port identifies the virtual channel business between OLT and ONU/ONT, namely the channel of carrying the business flow, similar to the VPI/VCI identifier in ATM virtual connection.

B.Each GEM Port is identified by a unique Port-ID, Port-ID range is 0 ～ 4095 and globally assigned by the OLT, and namely each ONU/ONT under OLT can't use duplicate GEM Port of Port-ID.

C.Each T-CONT is composed by one or more GEM Ports, each GEM Port carrying a business flow. A T-CONT can carry one or more types of data flow.

D.Each GPON port supports up to 32 ONU/ONT

A.False

B.True

A.the beam splitter losses

B.Welding and cold welding loss

C.connector, adapter (flange) loss

D.optical fiber transmission loss

A.2 and 3;

B.0 and 1;

C.6 and 7

D.0 and 2;

A.256

B.384

C.128

D.512