Programming manual
Programming the telephone 55
• If the DTMF tones are not recognized, or are recognized with difficulty, decrease the value
of the “Outgoing voice volume” parameter (in small steps of 2 or 3 units) and verify the
effect. If there is no improvement, increase the value of the “Incoming voice volume”
parameter until an acceptable level is achieved.
• Do not increase the “Incoming voice volume” parameter excessively, as an excessive value
may cause incorrect interpretation of DTMF tones.
• If the volume of the telephone messages is low, increase the “Outgoing voice volume” (in
small steps of 1 or 2 units) and verify the effect. An excessive value of the “Outgoing voice
volume” parameter may cause incorrect interpretation of DTMF tones.
In most cases, the value of the “Outgoing voice volume” parameter is between 15 and 25,
whereas, the value of the “Incoming voice volume” parameter is between 20 and 30.
If there is a SmartLinkAdv GSM interface, it is possible to adjust the values of incoming and of
the output volume parameters of the SmartLinkAdv.
Note
Any changes to the value of the SmartLinkAdv incoming volume parameter come into effect almost 2
minutes after the setting change, therefore, you must allow this time to pass before verifying the effect.
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