Alinco DJ-V57 - Manual (Page 41)

6.Selective Calling
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6.4.3 Redial (While Receiving)
This function generates the last DTMF tones used by the unit.
1. Press the FUNC key, and while is displayed on the LCD, press the key.
2. Press the key. The last DTMF tones (either the auto dialer code or a
manually input DTMF code) is automatically generated from the speaker. The unit
doesn't transmit the tones in this operation.
3. To transmit, press the FUNC key while pressing the PTT key, then the key.
Please note that you must operate the DTMF tones at least once to proceed above.