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VEC TRX-20 3.5MM Direct Connect Telephone Record Device (ADAPTER ONLY)

3.9 out of 5 stars 135 customer reviews
| 55 answered questions

Price: $18.48 & FREE Shipping on orders over $49. Details
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  • You need a voice recorder to use it.
  • Works with land line regular phone only no cell phone
  • Records both ends of a conversation
  • Can be used with any digital voice reorder or tape recorder.
  • Connects between the phone handset and base, enabling use on both digital and analog phone lines.
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Frequently Bought Together

  • VEC TRX-20 3.5MM Direct Connect Telephone Record Device (ADAPTER ONLY)
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  • SONY  ICD PX333 Digital Voice Recorder
Total price: $70.42
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Technical Details

  • Brand Name: KJB
  • Model Number: TRX20 3.5M
  • Caller Identification: N

Product Description

TRX-20-35B Telephone Recording Jack (3.5mm) TRX20 These WILL NOT WORK with CORDLESS PHONES. The TRX-20-35B Telephone Record Unit (specifically for 3.5mm mic inputs) adapts a recorder to both single or multi-line telephones. Simple and easy to use, this unit connects quickly between your telephone and handset providing crystal clear audio recordings. (The audio quality will be as good as the audio coming through your handset!). A modular connector simply plugs between handset cord and the telephone, and 3.5mm jack plugs into your recorder. When used with a multi-line phone, it will record whichever line you are talking on. 3.5mm microphone input plug on the tape recorder or digital recorder.

Product Information

Product Dimensions 2.3 x 1.6 x 3.6 inches
Item Weight 1.6 ounces
Shipping Weight 1.6 ounces (View shipping rates and policies)
ASIN B000KL0XA6
Item model number TRX20 3.5M
Customer Reviews
3.9 out of 5 stars 135 customer reviews

3.9 out of 5 stars
Best Sellers Rank #16 in Electronics > Accessories & Supplies > Telephone Accessories > Handset Cords
Date first available at Amazon.com July 24, 2006

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Customer Reviews

Top Customer Reviews

Verified Purchase
I had a need to record interviews taking place via phone for some academic research that I'm conducting. This is an excellent solution, and very easy to use. I work at a university, on the university's digital phone system. Because this plugs in at the handset, it can be used, I would presume, on any network, digital or analog. It can't be used with a cell phone that I can see, but for traditional phones, you could not beat this item.

I am currently recording conversations on an Olympus DS-30 Digital Voice Recorder Olympus DS-30 Digital Voice Recorder. Of course, consult local and state laws regarding required disclosure the legality of recording phone conversations.
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Verified Purchase
This interface plugs into the same jack as the headset and not the main line. At first this was confusing. However, once I figured that out all went well. The sound quality was as good as the phone receiver and it was easy to use with my laptop computer. For the cost, this was an unbeatable solution to the problem of recording meetings in an efficent and easy way.
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Verified Purchase
This adapter works very well in making a clean, hum-free, recording. This is because the circuitry uses a small transformer to isolate the sound signal. Cheaper adapters (i.e. $10 or less) do not use a transformer to reduce interference and hum. An adapter like this one is especially needed if you are going to connect it between your telephone and a headset amplifier. Having said all that, this unit has one big flaw in my opinion. It uses a mono jack for the audio out which is a problem if you are recording to a recorder or sound card that has a stereo audio recording input. Most recorders and sound cards have a stereo audio input. This means that if you record the phone conversation to a stereo recorder or sound card, the sound will only record on one channel and the other channel will have a very low volume of cross-talk or noise. Now it is true that the sound from the phone is monotone (one channel) but when you record, you want this monotone audio to be recorded on both the left and right channels for playback on all audio speakers, not just Left or Right, and to eliminate any noise on the channel where the audio has not been recorded. And it is true that you could adjust the settings on your recorder or PC to just record in mono, but for most this would be inconvenient and you might forget to do so before making a recording. Better phone recording adapters are designed to record on both Left and Right channels (see Mike Sandman Enterprises, Inc. Deluxe Handset Recording Adapter). Again, if your recording device is strictly mono (1 channel) audio input, your fine, but most are not. I strongly recommend that VEC redesign this unit with a stereo audio plug and have the sound output to both Left and Right channels.
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Verified Purchase
I combined this product with an Olympus WS-802 and the combination makes for a very easy to use system. I leave the parts continuously connected to my phone. When I need to remove the recorder for playback (for example in the car), I just remove the Olympus, and leave the coupler connected to the phone. Great system, easy to use. When I make a call, I have lots of time to turn on the Olympus, and then start recording just before I place the call. When I receive a call, it takes me about 3 seconds to turn the Olympus on, and start recording, and then I pick up the phone, as to capture the entire conversation.

The voice quality of the setup is pretty good, it captures only the left ear channel from the phone. I'm guessing this is because of the phone, since normally, the handset is place only on one ear so there's no need to carry two signals (left and right).

The phone I use is a Polycom 501 IP phone. But it doesn't really matter what phone, as long as the chord to your handset (that connects to the base) has the same kind of connector as most phones have. Whether IP phone or regular phone, the link between the base and the handset is analog I think... it doesn't make sense to put a bunch of sophisticated electronics (digital technology) into the handset, so I think all phones use analog signal from the base to the handset.
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Verified Purchase
This is a piece of equipment that is specifically designed to connect your landline phone to a digital voice recorder. You plug it into the phone and into the digital voice recorder mic jack. This is my second purchase of this model. The first one lasted for years, and I believe it still works fine. I think I was having problems with my digital voice recorder, not the adapter, but I ordered a new one of both just in case.

The problem is that with my old digital voice recorder, the Olympus DS-30, I think I remember that it recorded in stereo - or at least in such a way that the sound came out of both sides of my headphones. With the new digital voice recorder, the Olympus WS-822, the recorded conversations only come out of the right side of my headphones. If anybody knows what I am doing wrong, please let me know. Until then I am not completely happy, but the device does do its job.
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Verified Purchase
I use a NEC D-term Series E phone with a Plantronics wireless headset. I tried recording on several digital recorders. The volume coming in is loud and clear. However, my voice calling out is so quiet that I can hardly tell it is there. I tried attaching the adapter at several points in the system and get the same volume issues. Maybe it works with a different phone. Maybe it's the adapter. Hard to tell at this point.

Update: The adapter works fine on our NEC D-term phones without the Plantronics headset. I did some fiddling with my headset to increase the microphone volume and viola, it now works. Also, I was having some trouble getting the audio to work through the microphone jack on my laptop. The adapter has a 3.5mm mono plug and I had to pull the plug out slightly to get a connection. I have ordered a 3.5mm mono female to 3.5mm stereo male adapter. We'll see if this fixes things. Stars went from 2 to 4 now that I have the volume working right.
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