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.BN_4-wire 1.544 Mbps (DS1) with Super Frame (
EUT STD:47CFR68.317_Hearing aid compatibility volume control: technical standards.
Register:ACTA_SDoC_Administrative Council for Terminal Attachments