Xerox FaxCentre F110, Service Manual

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General Procedures / Information
FaxCentre F110 12/04 6-87
GP 38 LIU_HOOK
On-Hook Line Configuration
During terminal equipment On-Hook the line control signal stays inactive to inhibit a valid loop cur-
rent. Only an idle loop current (On-Hook, external On-Hook) is drawn from the network. The dial
control signal should be kept activated (PD = 0).
Off-Hook Line Configuration
The activation of the Hook-signal (HOOK = 1) establishes a connection between the terminal
equipment and the network. To draw a valid loop current the dial control signal (Hook/Pulse Dial
control signal, PD) has to be activated (PD = 0)in addition.
Figure 1
PSTN
Network
LA
LB
U
Line
I
Line
LB2 LA2
U
Int Loop
I
Ext Loop
LIU_HOOK
Terminal
Equipment
PD
1
0
1
Internal phone On Hook