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.DN_4-wire 1.544 Mbps (DS1) with SF/ Bipolar with eight-zero substitution
EUT STD:TIA-968-B Part 4_Part 4 COMMON REQUIREMENTS