General Procedures / Information
6-94 12/04 FaxCentre F110
GP 42 MUTE
On-Hook, Off-Hook Line Configuration
To receive tone signals during On-Hook, when no line connection has been established, and to
prevent corruption of tone signals during Off-Hook, a muting signal has to be used. To enable re-
ceiving of tone signals during On-Hook,
MUTE has to be deactivated. If transmitting of modem signals during Off-Hook is necessary the
muting control signal has to activated.
Figure 1
To gain a smooth On-Hook to Off-Hook transition and vice versa without any audible spikes, the
muting signal has to be switched accordingly using a set-up time (Off-Hook MUTE set-up time,
Off-Hook MUTE set-up time).
Pulse-Dial
To prevent any influence of voice signals from being transmitted via the line, or dial pulses heard
via the handset, a mute signal disables the voice path if activated. The MUTE signal has to be
activated prior dialling of a number and has to be deactivated, to re-establish the voice path, after
the digit has been dialled.
DTMF-Dial
To prevent any influence of voice signals from being transmitted via the line or dial tones heard
via the handset and to establish a connection between the modem and the line (MTXD), the mute
signal disables the voice path if activated. The MUTE signal has to be activated prior dialling of a
number and has to be deactivated, to re-establish the voice path, after the digit has been dialled.
HOOK
MUTE
Off-Hook
MUTE setup time
On-Hook Off-Hook
On-Hook
MUTE setup time
On-Hook
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