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13-14 Voice Cards
Model No.
Running Head
FXO Card User Screens and Settings FXO Card
Rx ABCD
The Receive ABCD information field shows the current values of the ABCD signaling bits
that are received from the network. If RX ABCD in the top half of the screen is changed via
the set function mentioned above, and the settings are saved by the Save command in the
Menu of Actions, the new bit pattern chosen will be reflected here.
T-R-CNTL
The Tip and Ring Control information field shows the current status of the Tip and Ring leads
of the FXO port from the perspective of the system. The possible values are:
• loop (the Tip and Ring leads are tied together)
• open (the Ring lead is not connected to either the Tip or to ground)
• rgnd (the Ring lead is grounded)
• lpgnd (the Tip and Ring leads are tied together and the Tip is grounded)
• ring (ringing voltage is being applied between the Tip and Ring)
T-R-STAT
The Tip and Ring Status information field describes what the attached device is doing with the
Tip and Ring leads of the FXO port. The possible values are:
• ring (attached device is applying ringing voltage between Tip and Ring)
• TbRg (attached device is applying -48V battery to Tip and grounding Ring)
• ToRo (attached device is leaving both the Tip and Ring leads open)
• TgRo (attached device is grounding the Tip lead and is leaving the Ring lead open)
• RbTg (attached device is applying -48V battery to Ring and grounding Tip)
• RbTo (attached device is applying -48V battery to Ring and leaving Tip open)
• TgR* (attached device is grounding Tip, and the Ring lead state is unknown)
• ToR* (attached device is leaving Tip open, and the Ring lead state is unknown)
• RoT* (attached device is leaving Ring open, and the Tip lead state is unknown)
• n/a (information is not available)
MODE
The Mode information field shows the current mode of the port that was selected on the main
FXO card Screen. Valid settings are fxo, fxodn, dpt or mrd.