Analog Code:FIC_02RV2.0_2-wire loop reverse battery signaling/ loop closure from customer/ reverse battery from LEC/ 600 ohms. Used for PBX-E911 trunks.*
Digital Code:FIC_04DU9.1KN_4-wire 1.544 Mbps (DS1) with Extended Super Frame (
EUT STD:TIA-968-B Part 5.3 ISDN & DSL INTERFACE REQUIREMENTS