Installation ~ LCD Programming
appropriate menu. Then press Enter. To descend a menu level (go deeper into the tree), press Enter. To ascend a menu level (go back toward the top of the tree), press ESC.
The Meter button will also access the Meter tree directly. The menu trees are structured in levels, such that the first level (top of the tree) branches into multiple subcategories (see Figure 2.7). These branches typically end when an adjustable parameter or viewable value is reached.
9
+12 
+8 
+4
Enter | Esc | 0 | Meter |
Figure 2.5. Front Panel Buttons
Adjusting a value
To adjust a parameter, first verify that it is flashing. If the parameter is not flashing, it cannot be adjusted until you press Enter. If the parameter is flashing, adjust the value with the Up and Down buttons. As the value is adjusted, the parameter is updated immediately. For example, if you adjust input gain, you should be able to hear the difference as it changes. To store the new value, press Enter. To discard the change and revert back to the old value, press ESC. In general, while adjusting parameters, numerical values do not wrap around when the end is reached. However, parameters that toggle between two values (or are a list of values) will wrap around. When adjusting a parameter, press and hold the Up or Down button for more than two seconds to scroll through the values at a faster rate.
✍
Pressing ESC at the top of the tree has no effect.
GT1524 Parameters Worksheet
System-Wide Parameters
Program Parameter | Selection Range |
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Lock Panel | On, Off |
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Set Passcode | Any 5 Front Panel Keys (Enter) |
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RS232 Baud Rate | 9.6, 19.2, 38.4 kbps |
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RS232 Flow Control | On, Off |
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Telco Auto Answer | On, Off |
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Telco Auto Disconnect | Off, Loop Drop, Call Prog, LD + CP |
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Telco Ring Indication | Off, 1, 2, 3, 4 |
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Unit ID No. | Factory Programmed |
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*Timeout | 0 - 15 (10) |
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*Telco Adapt Mode | Auto, Burst |
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*Hook Duration | 50 ms, 500 ms |
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*Receive Reduction | On, Off |
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Meter |
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Program Parameter | Selection Range |
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Default Meter | Any Input/Output (Spkr/Line Out) |
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Input Channel |
| Mic/Line In | Aux In | 4 Wire In | From Telco |
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Program Parameter | Selection Range |
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Gain Adjust |
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Mic/Line Input | Mic 55dB, Mic 25 dB, Line |
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Mute | On, Off |
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Phantom Power | On, Off |
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AGC | On, Off |
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On, Off |
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Echo Cancellation | On, Off |
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NLP Adjust | Off, Soft, Medium, Aggressive |
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Output Channel |
| Spkr/Line Out | Aux Out | 4 Wire Out | To Telco |
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Program Parameter | Selection Range |
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Gain Adjust |
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Mute | On, Off |
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Aux Out Mix (Mic/Line In) | On, Off |
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Aux Out Mix (Aux In) | On, Off |
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* Set up only by serial port