Simon Security System 51
Option 76: VOX Gain Range
(Default = 64)
Sets the gain range for the voice-activated 
switching (VOX).
The available settings are 01 (low) - 64 
(high). Entries must be 2 digits.
For best results, this option should be set 
equal to or greater than Option 75: VOX Mic 
Gain. For panels with a built-in microphone, 
this option should be set to the default value.
Note  
This option works in conjunction with Option 75: 
VOX Mic Gain. It is important to follow the set-
ting recommendations as described to achieve 
acceptable operation.
¾To set VOX Gain Range, press:
1. Add
2. Option #
3. 76
4. Use the numbered keys to enter 01 - 64 (entries must be 2 digits).
5. DONE
¾
To reset VOX Gain Range (return to default), press:
1. Delete
2. Option #
3. 76
4. DONE
Option 77: Manual Mic Gain
(Default = 64)
Determines the gain level (sensitivity) during 
2-way audio sessions, when Option 33: 
Audio Verification is set to 0 or 1 (Speak).
Room size, acoustics, and furnishings where 
the panel or Interrogator 200 are located will 
influence the setting. The available settings 
are 01 (low) - 64 (high). Entries must be 2 
digits.
For panels with a built-in microphone, a set-
ting of 64 is recommended. For systems 
using the Interrogator 200, a setting of 20 
should be used.
¾
To set Manual Mic Gain, press:
1. Add
2. Option #
3. 77
4. Use the numbered keys to enter 01 - 64 (entries must be 2 digits).
5. DONE
¾
To reset Manual Mic Gain (return to default), press:
1. Delete
2. Option #
3. 77
4. DONE
Option 78: VOX Receiver Gain
(Default = 06)
Determines the receiver gain level during 2-
way audio sessions.
If the VOX is switching the speaker on when 
the central station operator is not talking, 
lower both this setting and Option 75: VOX 
Mic Gain setting. If the VOX is not switching 
the speaker on when the central station opera-
tor is talking, raise this setting and lower 
Option 75: VOX Mic Gain setting.
Note  
Changing this setting does not affect speaker 
volume.
This option can be set from 01 - 10. Entries 
must be 2 digits.
¾
To set VOX Receiver Gain, press:
1. Add
2. Option #
3. 78
4. Use the numbered keys to enter 01 - 10 (entries must be 2 digits).
5. DONE
¾
To reset VOX Receiver Gain (return to default), press:
1. Delete
2. Option #
3. 78
4. DONE