User guide

9
Chapter 1 - Introduction and Description
VOICE/FAX CHANNELS (FR221/V2 Only)
FXS Foreign Exchange Station indicator lights when the voice/fax Channel is configured for FXS
operation.
FXO Foreign Exchange Office indicator lights when the voice/fax Channel is configured for FXO
operation.
E&M Ear and Mouth indicator lights when the voice/fax Channel is configured for E&M operation.
FAX Fax indicator lights when there is fax traffic on the voice/fax Channel.
XMT Transmit indicator blinks when voice packets are being transmitted to the composite link.
RCV Receive indicator blinks when voice packets are being received from the composite link.
XSG Transmit Signal indicator lights when the FXS-configured Channel is off-hook, the FXO-
configured Channel is receiving a ring from the PBX, or the M lead is active on the E&M-
configured Channel (i.e., the MultiFRAD is receiving a ring from the PBX).
RSG Receive Signal indicator lights when the FXS-configured Channel is ringing, the FXO-
configured Channel has taken the line off-hook, or the E lead is active on the E&M-
configured Channel.