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Analog Ports
8-5
• Loop-reverse-battery signaling
• Network-provided reverse-battery signaling
• E&M signaling
• Customer-installation-provided loop-start supervision.
8.2.1 Update Interval
The Update Interval window graphically represents the user-selected interval for updating the infor-
mation on this screen. Set the interval by dragging the slide control up and down with your mouse
cursor. To turn off updates, put the slide control at its lowest position.
Figure 8-2: Update Intervals
The interpretation of the signaling bits for D4 framing are as follows:
D4 (SF) Framing Format
See the legend at the end of this table for explanations of abbreviations.
Signaling Type State Receive (Network-
to-Subscriber)
Transmit
(Subscriber-to-
Network)
Rx Tx ABAB
Loop-start
signaling (FXO-
FXS)
LCF LO (on hook)0101
RingingLC (off hook)0011
Loop-start
signaling with
RLCF (FXO-FXS)
LCF LO (on hook)0101
RLCF LC (off hook) 0 1/0 1 1
LCFO 1 1