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4
RING mode (on Hook) – normal operating mode
Incoming call (default)
In the default setting
on Hook
, the TP09D waits for a call. The sequence and
volume of the sound signal can be adjusted in the setup menu.
Immediately after the first incoming call, the device is automatically switched
on and „listens“ to the line. If the line transmits CLIP data in FSK format, it is
evaluated and shown on the display. The phone number and, if transmitted,
name, date and time are displayed for 10 seconds. With the TP09D, the first
call signal suppressed by conventional SMS telephones is not suppressed
for control purposes.
If CLIP is transmitted, all transmitted information is displayed and stored un-
der CID RCL.
The last three calls are stored in the CID RCL memory. If no CLIP is trans-
mitted, the information
NO CLIP DETECTED
. If the information is transmitted
but errors are detected, the
CRC ERROR
information appears in the display.
These errors can be caused by poor signal quality or missing information.
An incoming call is accepted by pressing the
off Hook
key.
The test handset can now be used for telephoning like a normal handset. The
open listening mode is activated with the
SPKR On / Off
button on the rear
handle. The volume can be adjusted in 6 steps with the
Vol +
and
Vol -
keys.
These keys are greatly delayed to prevent incorrect operation. The micro-
phone is deactivated in open listening mode. This mode is only used to do-
cument and check whether a dial tone is present without having to hold the
test handset to the ear.
