AudioCodes C450HD - Configuring Speaker Volume; Table 5-59: Speaker Parameters

Administrator's Manual 5. Configuring VoIP Settings
Version 3.4.3 121 400HD Series IP Phones
5.9.4 Configuring Speaker Volume
The speaker volume can be configured.
Note: It's strongly advisable not to change the default values.
 To configure speaker volume:
• Use the table as reference.
Table 5-59: Speaker Parameters
Parameter Description
Hands-free Gain Parameters
Note: Values are in decibels (dB)
 Decimal places: Use underscore instead of period (e.g.,
plus19_5db
).
voip/audio/gain/NB/handsfree_digital_input_gain
Digital input gain (in dB) – Narrow Band.
Default = -6.
The valid range is (-32) to 31 (dB), where -
32 is mute.
voip/audio/gain/NB/handsfree_digital_output_gain
Digital output gain (in dB) – Narrow Band.
Default = -10.
The valid range is (-32) to 31 (dB), where -
32 is mute.
voip/audio/gain/WB/handsfree_digital_input_gain
Digital input gain (in dB) – Wide Band.
Default = -6.
The valid range is (-32) to 31 (dB), where -
32 is mute.
voip/audio/gain/WB/handsfree_digital_output_gain
Digital output gain (in dB) – Narrow Band.
Default = -10.
The valid range is (-32) to 31 (dB), where -
32 is mute.
voip/audio/gain/NB/handsfree_analog_output_gain
Analog output gain (in dB) – Narrow Band.
Valid values: 0db (default), minus1_5db,
minus3db, minus4_5db, minus6db,
minus7_5db, minus9db, minus10_5db,
minus12db, minus13_5db, minus15db,
minus16_5db, minus18db, minus19_5db,
minus21db, minus22_5db, minus24db,
minus25_5db, minus27db, minus28_5db,
minus30db, minus31_5db, minus33db,
minus34_5db, minus36db, minus37_5db,
minus39db, minus39db, minus42db,
minus48db, minus54db, MUTE