4. PBX Systems
4.7.3. Flexible Line Keys
There are 16 Flexible Line keys located on the top of the DTerm Series III
telephone as shown in Figure 16. These keys are configured by the system
programmer to perform many different functions. When programming the
telephone, the Flexible Line keys are used to select the programming mode or
sub-mode. There is a two color LED indicator associated with each Flexible
Line key. The LEDs can be in any of the states listed in Table 34.
Table 34. DTerm III Series LCD Indicator States
State Value (Hex)
Off 0x00
On 0x01
Ringing 0x02
Hold 0x03
Error 0x04
Unknown 0x05
There is an LCD indicator associated with each Line Key.
• The lower nibble (lower 4 bits of the value ANDed with 0x0f) of the LCD
indicators value can take one of the six states in Table 34.
• The upper nibble (value ANDed with 0xf0) can take one of the values in
Table 35.
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