Sir , you need to program the KEY on the DT750 the FKY=165 SPD name display and all other keys as SPD keys FKY =59 then go to phones and program the one touch key with name

1- press the SPD name display
2- press the SPD key
3- fill the name
4- select feature key + the SPD key with name + ext number or out number + feature a gain now you will have SPD key with name once press it the call will be start


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