General Procedures / Information
6-80 12/04 FaxCentre F110
Parallel Terminal Equipment Off-Hook(FCU On-Hook)
The loop current change due to an parallel off-hook condition has only little effect for the idle loop
current (On-Hook state).
Figure 3
Incoming Ring (On-Hook)
The line voltage change due to an incoming ring has no effect on the loop current detection if
LIU_HOOK=0 and may have an effect if LIU_HOOK=1. See also EXTLOOP signalling.
CLI Polarity Reversal Detection (On-Hook)
The line voltage changes the polarity as well as the idle loop current, but has no effect if
LIU_HOOK=0 and may have an effect if LIU_HOOK=1.
Pulse-Dial
The signalling during Pulse-Dial has been described in detail with PD Pulse-Dial. The current
changes during Pulse-Dial are mirrored by INTLOOP.
Loop Current
[mA]
Valid Loop Current
min. Loop Current
threshold
Idle Loop Current
No Loop Current
Off-HookOn-Hook
LA, LB
On -> Off-Hook transition time
On -> Off-Hook
[V]
min.Off-Hook)
On-Hook Off-Hook
max. On-Hook
Parallel On ->
Off-Hook
Parallel Off-Hook
Parallel
On-Hook
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