Guardian Telecom Inc.
Installation and Operation
DTT-50 & DTT-60 Telephones
Page 16
3. Numeric keys, [*] key, and [#] key on the Keypad:
While in the Operating Mode, all the numeric keys, the ‘*’ key, and the ‘#’ when pressed will be
dialed out, (if the phone is set to pulse dialing the [*] and [#] keys are not supported). The
maximum number of characters that can be dialed out are 32. The dialed out characters will be
displayed on the LCD starting from the first character to the left on the first line and ending at
the last character to the right on the second line. The dialed number on the display will be
maintained for 6 seconds, then the display will switch back to show the Audio Mode status until
further numeric keys are pressed.
4. The [
↑
] and [
↓
] keys:
The up and down arrow keys adjust the volume of the hearing device currently being used.
Each press of these keys will increase or decrease the volume by 2 dB within a range of 15 dB.
The LCD will display the current volume setting for two seconds then switch back to show the
Audio Mode status.
5. [Link] key:
The [Link] key which is sometimes referred to as [Flash] will provide a timed disconnect to the
current on the phone line. The period can be configured to 280ms or 600ms and is required for
some Central Office or PABX functions.
6. [RLS] key:
The [RLS] key will disconnect the phone from the phone line for one second to reset the phone
line for next call.
7. [Redial] key:
Pressing the [Redial] key after going off hook will dial out the last keys stored in the dial buffer.
It may be different than all the keys that were pressed in the previous call.
The number dialed out will be displayed on the LCD starting from the first character to the left on
the first line and ending at the last character to the right on the second line.
The dialed number will be displayed for two seconds then the LCD will switch back to show the
Audio Mode status.
The arrow keys will resume the volume control function.
Subsequent keypad dialing is resumed.
8. Quick dialing and Phone Book Call:
Quick dialing and Phone Book calling must be used just after going off hook. If manual dialing
is used, Quick dialing and Phone Book will be disabled.
A. Quick dialing:
There is provision for 10 Quick dialing phone numbers in the phone. To activate Quick
dialing, press the [MR] key.
The register number prompt will be displayed:
Enter REG #: ..
[REG 0 to 9]
Press one numeric key (0 to 9). The phone number in the register will be dialed out to
the phone line as well as being displayed on the LCD. The dialed number will be
displayed for two seconds then the LCD will switch back to show the Audio Mode status.
The arrow keys will resume the volume control function. Subsequent keypad dialing is
resumed.
B. Phone Book dialing:
There are twenty phone numbers in the Phone Book including the 10 Quick dialing
phone numbers. To activate the Phone Book press [MR] twice.
The register number prompt will be displayed:
Enter REG #: ..
[Phone List]
