General Procedures / Information
6-88 12/04 FaxCentre F110
CLI Services
To signal a CLI service transmission start, during CLI service handling, the terminal equipment
has to draw a current pulse from the network (Wetting Pulse) by activating the HOOK signal.
To signal a valid preparation for CLI reception, a short loop current pulse is drawn from the net-
work. This is handled by activating the line connection switch (HOOK) for a defined duration.
Figure 2
HOOK
PD
Wetting
Pulse time
Line Current
Idle Loop Current
Valid Loop Current