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- Doctor Who presents:
- Motorola series 2 and 3 transceivers
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- 25 pin cable pin defenitions
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- Pin Designation/Function
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- --- --------------------
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- 1 Transmit Audio / ON - OFF Function
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- 2 Mobile / Transportable Select line
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- 3 Ground (A+ return), one of 2 black wires. Both are required for proper
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- operation
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- 4 Battery A+, one of 2 red wires. Both are required for proper operation.
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- 5 Ignition Sense Lead, green with a black tracer.
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- 6 Receiver Audio to handset (RX High), pin 8 on the handset connector
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- 7 Ground
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- 8 Regulated +9.5 volts to handset, pin 2 on handset connector
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- 9 Ground
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- 10 Auxiliary Alert, yellow with black tracer, used to blow the horn or
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- flash the headlights. Provides a ground function. NOTE: 1/2 amps
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- maximum current. The recommended method is to drive a relay
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- (e.q. MOT 59K813674). Ignition Sense, pin 5, must be low for this
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- function to work.
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- 11 T-Data, one of the 3-wire bus lines, to pin 3 of the handset connector.
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- 12 C-Data, one of the 3-wire bus lines, to pin 4 of the handset connector.
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- 13 Ground
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- 14 Transmit Audio Shield
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- 15 Transmit Audio
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- 16 Battery A+, one of two red wires. Both are required for proper
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- operation.
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- 17 Ground, one of two black wires. Both are required for proper operation.
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- 18 R-Data, one of the 3-wire bus lines, to pin 5 of the handset connector.
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- 19 Receiver Audio to External Speaker.
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- 20 Ground for Receiver Audio (Shield) to External Speaker.
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- 21 Manual Test Line. When tied low places the telephone in TEST MODE.
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- 22 Ground
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- 23 Handset Logic Ground, to handset connector pin 1
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- 24 Handset Audio Ground, to handset connector pin 6
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- 25 Accessory Ground, to External Speaker.
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- -end
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