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Analog Code: FIC_02GS2_2-wire ground-start signaling closed end provided by end user 600 ohms
Digital Code: FIC_04DU9.1KN_4-wire 1.544 Mbps (DS1) with Extended Super Frame
EUT STD: 47CFR68.317_Hearing aid compatibility volume control: technical standards.
Register: ACTA_SDoC_Administrative Council for Terminal Attachments
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