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MMI Features
•
Ring tone volume
•
Key Clicks tone volume
•
DTMF tone volume
•
Gain reduction for mic (for howling suppression)
•
Gain reduction for speaker (for howling suppression)
Note: An Audio Template will be under control of Motorola and cannot be modified. If a customer
chooses to modify an Audio Profile (that is using other than Template defined values) it is as
his own responsibility and will not be supported by Motorola. However, some parameters,
though, will be allowed to be modified. CPS users shall have the ability to create more than
one audio profile from a single template. A "editable" check box has been implemented in
CPS that grays out all parameters except those that the customer is allowed to change.
Checking / un-checking this shall give a warning/disclaimer. If the terminal user changes the
non-allowable audio parameters, Motorola bears no responsibility for the malfunctioning of
this profile / feature.
18.13.2.19 Audio Profile on Power Up
Once the terminal has been switched OFF, it remembers the last selected audio profile upon
switching ON again.
18.13.2.20 Selecting an Audio Profile
The terminal provides the user the ability to select an audio profile from the Audio Profiles section of
the menu.
18.13.2.21 Using Default Audio Parameters in an Audio Profile
An "Editable" check box is implemented in the CPS. By default, it remains unchecked, that gray's
out some of the audio parameters which means the customers are not allowed to modify them.
Checking this "Editable" box shall unlock the locked audio parameters and opens them up for the
customer to modify.
18.13.3 Howling Suppression
"Howling Suppression" is a mode of operation that increases the stability of the acoustic feed back
loop from receiving radios to the sending radio in simplex calls so as to avoid howling. The terminal
eliminates howling and this may (even preferable) be done either by the menu or via an OTB to
temporarily enable a special anti-howling function.
18.13.3.22 Howling Suppression Enabled/Disabled
When the howling supression is enabled, a profile dependant transmit and receive gain offsets is
used to minimise the loop gain. Upon power-up, suppression of howling is disabled.
18.13.3.23 Service and Feature Interaction
If the users are in an active call, then they can change the audio profile.
18.13.3.24 Howling Suppression During an Active Call
If the users are in an active call, then they have the ability to enable/disable the howling
suppression.
March 2009
Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
2-59
6866588D21-D
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