This How-To covers adjusting the gain settings on the ShoreTel 400 series handsets (420/480/480g/485g). This is a slightly different process to the 100/200/500 series handsets but still involves editing the phone config file, just in a slightly different way.
1: Open Config File
Browse to the following location on your ShoreTel Director Server:
From here, there should be the following config files:
custom.txt (global changes to all 400 series handsets)
custom_IP420.txt (changes to all 420 handsets)
custom_IP480.txt (changes to all 480 handsets)
custom_IP480g.txt (changes to all 480g handsets)
customIP485g.txt (changes to all 485g handsets)
custom_MAC.txt (changes to specific handsets based on the MAC address of the handset)
Note: Depending on whether you want to make this a global change, a change to specific types of handsets or single users will depend on which file you want to change.
2: Choose The Parameters To Modify
You can modify the below gain settings in this config file:
Handset Microphone Analog Gain (Default: 6. Other Values: 0, 3, 6, 9, 12)
Handset Microphone Digital Gain (Default: 3. Other Values: -3, 0, 3, 6, 9, 12)
Handset Speaker Analog Gain (Default: -12. Other Values: -18, -15, -12, -9, -6)
Handset Speaker Digital Gain (Default: 0. Other Values: -6, -3, 0, 3, 6)
Headset Microphone Analog Gain (Default: 12. Other Values: 6, 9, 12, 15, 18)
Headset Microphone Digital Gain (Default: 3. Other Values: -3, 0, 3, 6, 9)
Headset Speaker Analog Gain (Default: -12. Other Values: -18, -15, -12, -9, -6)
Headset Speaker Digital Gain (Default: 0. Other Values: -6, -3, 0, 3, 6)
Handset Sidetone Gain (Default: -24. Other Values: -33, -30, -27, -24, -21, -18, -15, -12, -9)
Please see the below parameters relevant to the specified type of handset:
3: Modify Config File
Add in the relevant parameters to the config file in the following format:
For example, if we wanted to change the Side Tone Gain (the level at which you hear your voice while speaking into a handset) of a 420 handset, you would enter the following:
This would make the Side Tone more audible than the default value of -24. As a general rule of thumb, the lower the value, the lower the gain will be (i.e. for Side Tone Gain, -33 would be the quietest gain level and -9 would be the loudest gain value).
For reference, audiohalm is the group used for each of the above gain settings. Other options require different a different group entry to be set, but all gain settings use the audiohalm group.
NOTE: When adjusting values for any of the above parameters, it is important to remember that analog gain and digital gain are cumulative values. To determine the total gain, add the analog gain and digital gain values. Please be aware that increasing the gain levels can cause echo in the network or distortion for users at either end.
4: Save Config File
If you are creating this config file for a single extension, save the file as a new file and name it as follows:
custom_MAC.txt (where MAC is the MAC Address of the handset in question e.g. custom_00104928630b.txt)
Otherwise, just overwrite the existing config file as per the file names in step 1.
5: Reboot The Handset
Once the config file has been saved, reboot the handset and it should pull down the new config file.
After the phone has pulled down the new config file, carry out some tests to see whether the changes have made a difference. If further adjustments are needed, modify the config file where necessary.