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The ALRC-100 toggle switch is set toward the jack (B) for recorders with microphone input, and away from the jack (A) for normal telephone level recording.

| TOGGLE SWITCH | RECORDER JACK |
| A = telephone B = microphone |
1=nc 2=switch common 3=Tip 4=Ring 5=switch normally open 6=nc |
![]() | Set the 3-position slide switch on the side of the ALRC-100 for the mode required. |
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![]() | POSITION A For basic telephone with looop current. Loop current controls audio output. Audio output only, no contact closure. |
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![]() | POSITION B For basic telephone with loop current. Acts as loop detector. Provides normally open dry contact closure. |
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![]() | POSITION C For analog sets without loop current. Provides loop closure plus record/playback on basic telephone. Audio is permanently connected to the line. |
| qty | part | description |
| 1ea. | MA8 cable | 6ft length. 1/8" mini-phone plug to RJ11 plug. |
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