Howto:Adjusting the volume parameters on IP200A, IP110, IP230 and IP150 in Version 6 and later Firmware

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Summary

This Howto describes the configuration of the volume parameters for user of an IP110, IP200A and IP230

Applies To

This information applies to

  • Inca based IP phones (IP200A, IP110, IP230, IP150) version 6.

More Information

Problem Details

In some cases the default parameters are not perfectly matching the customer requirements. To adapt to the customers needs, there are a number of volume parameters which can be tuned.

At the phone, there are two amplifiers, one analogue and one digital, separately adjustable.

Tip! Try to keep down the analogue amplification.

Configuration

The acoustical parameters are specified separately for each component 

config change INCA_DSP HANDSET ...
config change INCA_DSP HEADSET ...
config change INCA_DSP SPEAKER0 ...

All of the configurable parameters given here have separate values for each volume level (1..8, lowest level first), in case of an incomplete specification the last specified value is used for all remaining levels, e.g.: 

/uatt_ATT f1,e4,d7,cb,bf is equivalent to /uatt_ATT f1,e4,d7,cb,bf,bf,bf,bf

/uatt_ATT bf is equivalent to /uatt_ATT bf,bf,bf,bf,bf,bf,bf,bf

All parameters for one component must be entered the usual way with one "config change" command, for example 

  http://172.16.16.128/!config change INCA_DSP HANDSET /afe_arcr_HOC1 4 /afe_acr_atcr_MIC 4

  http://172.16.16.128/!config activate

The "config activate" command applies the new parameters on the fly, even if the addressed component is currently in use. Thus the result of a change can be checked on an active connection.

A dump of the built-in parameter is written to trace buffer when the driver is told to do verbose traces by the command line 

 config change INCA_DSP /mtrace ...


To remove mtrace: 

config change INCA_DSP
config write
config activate


Side tone gain

The side tone gain (the volume of your own voice fed back into your speaker) is volume level dependant and available for the handset and the headset only. It is set by the following command flags: 

 /uatt_ATT <gain1>,<gain2>,...<gain8>

The default for both handset and headsets ist 

 /uatt_ATT f1,e4,d7,cb,bf,a1,8f,80

The gain settings can be taken from the following table

Gain dB -0.5 -1 -1.5 -2 -2.5 -3 -3.5
0 ff f1 e4 d7 cb bf b5 ab
-4 98 8f 87 80 79 72 6b
-8 65 60 5a 55 50 4c 48 44
-12 40 3c 39 36 33 30 2d 2°
-16 28 26 24 22 20 1e 1c 1b
-20 19 18 16 15 14 13 12 11
-24 10 0f 0e 0d 0c 0c 0b 0a
-28 0a 09 09 08 08 07 07 06
-32 06 06 05 05 05 04 04 04
-36 04 03 03 03 03 03 02 02
-40 02 02 02 02 02 01 01 01
-44 01 01 01 01 01 01 01 01
-48 01 00 00 00 00 00 00 00


Analogue to digital / digital to analogue gain

The external i/o devices (microphone and loudspeaker) are attached to the phones digital voice processor using an A/D converter. To normalize the signal levels (such as the different microphone levels from the handset and a headset), an analogue front end is used. This shall be used to make sure all I/O sources used have equivalent levels towards the A/D converter. The analogue front end is not meant to change the overall volume. This is done in the digital amplifier. So if the phone is e.g. too loud overall, then don’t tweak the analogue front end. However, if e.g. the headset is too loud compared to the handset, then adjust analogue front end parameters for the headset.


Analogue Amplification

As described above, the analogue settings are used to adapt a single I/O source to the overall signal level. Please note that this is normally not required anyway as the handset and speakerphone are already properly adjusted. However, when attaching headsets, some tweaking of the analogue gains may be useful.


Microphone

The microphone amplification is set by 

/afe_acr_atcr_MIC <volume>

Where <volume> is in the range of 1..7.

Handset default is /afe_acr_atcr_MIC 5.

Headset default is /afe_acr_atcr_MIC 6.

Speakerphone default is /afe_acr_atcr_MIC 6.


Handset Speaker Volume 

/afe_arcr_HOC1 <gain1>,<gain2>,...<gain8>

Where <gain> is in the range of 1..9 (1 == maximum volume)

Default is /afe_arcr_HOC1 3.


Headset Speaker 

/afe_arcr_HOC2 <gain1>,<gain2>,...<gain8>

Where <gain> is in the range of 1..9 (1 == maximum volume)

Default is /afe_arcr_HOC2 3.


Speakerphone Speaker 

/afe_arcr_LSC <gain1>,<gain2>,...<gain8>

Where <gain> is in the range of 1..12 (1 == maximum volume)

Default is /afe_arcr_LSC 4.


Digital Amplification

Digital gains are used to change the overall volume of a phone. This is somewhat cumbersome. Then again, it is rarely required.


Digital Inbound Direction 

/afe_IFG1  <gain1>,<gain2>,...<gain8>

Handset default is /afe_IFG1 32f5.

Headset default is /afe_IFG1 47fb.

Speakerphone default is /afe_IFG1 392d.


Digital Outbound Direction 

/afe_IFG2  <gain1>,<gain2>,...<gain8>

Handset default /afe_IFG2 036c,066c,096c,136c,166c,196c,1ca8,2027.

Headset default /afe_IFG2 036c,066c,096c,136c,166c,196c,1ca8,2027.

Speakerphone default /afe_IFG2 196C.


The digital gain settings can be taken from the following table

Gain dB -0.5 -1 -1.5 -2 -2.5 -3 -3.5
12 7fff 78d7 7215 6bb3 65ad 5ffd 5a9e 558c
8 50c3 4c3f 47fb 43f4 4027 3c90 392d 35fa
4 32f5 301b 2d6b 2ae0 287a 2637 2413 220f
0 2027 1e5b 1ca8 1b0d 198a 181c 16c3 157d
-4 1449 1327 1215 1112 101d 0f36 0e5d 0d8f
-8 0ccd 0c15 0b68 0ac5 0a2b 0999 0910 088e
-12 0814 07a0 0733 06cc 066a 060e 05b8 0566
-16 0519 04d0 048b 044a 040c 03d2 039c 0368
-20 0337 0309 02de 02b5 028e 0269 0247 0226
-24 0207 01ea 01cf 01b5 019d 0185 0170 015b
-32 0148 0135 0124 0114 0104 00f6 00e8 00db
-36 00c3 00b8 00ae 00a4 009b 0092 008a 00c3
-40 004e 0049 0045 0041 003e 003a 0037 004e

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Howto:How to adjust the volume parameters on IP110, IP200A and IP230 in Version 5 Firmware

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