Auerswald COMpact 4000 Operation Manual page 560

Settings
Analogue Connection
Expert Configuration, Analogue Connection
Transmission amplification (-6 to +6 dB)
The transmission amplification specifies the number of decibels by which the PBX reduces or
increases all outgoing audio signals.
This is necessary if the recipient considers the audio signals to be too loud or too quiet (e.g.
the volume at which speech is output to an external call partner).
Echo Cancellation
This compensates for local echoes and reverberation effects.
Line Connection
Waiting for dial tone
Before the PBX dials a phone number it checks whether a dial tone has been sent from the
central office. It starts dialling as soon as it detects a dial tone for 200 milliseconds
This function prevents the PBX dialling the wrong number by starting dialling too early if the
central office takes too long to play the external dial tone it generates.
Note: Disable this setting if the dial tone cannot be sent clearly by the central
office and, as a result, cannot be identified by the PBX.
Waiting time (3 to 30 seconds)
The waiting time for a line connection setting specifies the time (in seconds) after which the
PBX stops establishing the connection if it does not recognise a dial tone, although the wait for
dial tone setting is enabled.
If the wait for dial tone setting is disabled, the PBX starts dialling after approximately 4 seconds.
Transmit line access code automatically (0 to 9, *, #)
The number/character string entered here is automatically added to the selected phone
number as a prefix.
This is needed if the central office always requires a specific leading number/character string
that is not part of the phone number.
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COMpact 4000 - Firmware V6.6A - Installation, Operation and Configuration V03 03/2016