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Pinout Diagram DB25 Connector VX6000

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Premium Subscriber
May 24, 2003
Christiansburg Ohio
Looking for a pinout diagram for the DB25 connector on the VX6000 (maybe also the same for the VX4000/5500??) I need to interface a 2 tone encoder to one and I have not been successful on any response from Vetex tech support. A pdf would be great in that I will need to interface some headset systems soon also.



Feed Provider
May 1, 2010
Monongahela, PA
Here you go Dan.
Also the Service manual is on it's way to your email.

Pin 1: RSSI [Analog Output]
Pin 2, 3, 4, 5 & 6: SELECT, DSUB 03, DSUB 04, DSUB 05 & DSUB 06 [Digital Input Port]
Pin 7: E [GND]
Pin 8: A KEY OUT [Universal Output Port]
Pin 9: TXD [Digital Output for Alignment software]
Pin 10: RXD [Digital Input for Alignment software]
Pin 11: EXT PTT
Pin 12: MIC MUTE
Pin 13: TXDI [Digital Input for DATA Communications]
Pin 14: DC OUT [13.4 V/5 V DC Output]
Pin 15: IGN [Ignition Sense feature]
Pin 16: NC [NO connection]
Pin 17: RX DO [Digital Output for DATA Communications]
Pin 18: E [GND]
Pins 19, 20, 21, & 22: DSUB 19, DSUB 20, DSUB 21 and DSUB 22
Pin 23: EXT SQL [Squelch Signal Output]
Pin 24: SP MUTE [Speaker Mute Output]
Pin 25: E [GND]

If you need more let me know.

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Sep 28, 2005
Lawrence, KS
VX4000 manual

John, could I get a copy of this service manual as well? Your pinout info already helped - it turns on now!

Dave, KJ0C


Jul 9, 2005
Cold Point Hill, PA
Hi! Thought I'd piggyback onto this thread with the hope that John gets notified- he hasn't visited since November last year...

Anyhow, I have a VX-5500, and I'm wondering if/how the "ignition sense" cable works on that model. I see from the pinout that #16 is Ignition sense on the 6000, but I also see in a VX5500 rogue service manual sinppet there on the interwebs:

Pin 15: IGN[Ignition Sense feature]The VX-5500 may automatically be switched tothe STAND-BY mode when the vehicle's ignition key is turned on.Maximum current is 20 mA.This feature is only enabled on transceivers con-figured for Dual Deck operation
SO, I'm wondering if this is correct...and if so, how in da heck do we set one of these up to go hot with the ignition and turn off when the car is turned off?? The owner's manual says to connect to battery ONLY and specifically indicates to NOT hook up to the fuse box.

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