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Analog Code:FIC_02RV2.T_2-wire loop reverse battery signaling/ loop closure from customer/ reverse battery from LEC/ 600 ohms. Used for Direct Inward Dialing
Digital Code:FIC_04DU9.BN_4-wire 1.544 Mbps (DS1) with Super Frame (
EUT STD:TIA-4965_Receive volume control requirements for digital and analog wireline handset terminals