ADSL Filter Landline Call Recorder

ADSL Filter Landline Call Recorder

Encrypted Black Box Landline Call Recorder

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An easy to use call recording device for landlines, capturing both incoming and outgoing calls for presenting evidence of malicious calls and maintain phone records with this telephone call recorder.  Simply plugs directly into a BT wall socket to automatically store up to 240 hours of calls.  As an extra feature, this device also offers encrypted audio recordings in WAV format.


Availability: In stock
Automatic Telephone Landline Recorder; with Removable Encryption Key

This Encrypted Black Box Landline Call Recorder is an innovative product which helps record your telephone calls for prosperity and simply plugs into any existing telephone wall socket.  The call recorder automatically captures incoming and outgoing telephone calls without the need for any setup or technical skill whatsoever.

The small hand built unit uses a special electronic system for virtually maintenance free operation.  All telephone calls are recorded in digital WAV format which can be played back on a Windows or Mac computer.

Measuring just 65 x 50 x 15 mm, the device is equipped with an in-built fully rechargeable lithium battery which provides up to six (6) months of standby time (per charge) and a storage capacity to hold 240 hours of telephone calls.


This recent security addition ensures your call recordings cannot be accessed from the black box without the associated encryption key.  When the key is removed, the audio files become encrypted and cannot be accessed. 


Without the appropriate audio evidence you simply cannot act.  Verbal slander is on the rise.


How many times have you heard something during a telephone call or made a verbal agreement which you can not prove?  How frustrating is it when you know the other person agreed on something but is now denying?

Whatever your reasons may be, telephone recording within your own property and of your own calls is legal and should be used as a way of logging vital audio evidence to protect your integrity.

Ideal for the home or office user with the added security of encrypted storage and super easy to use.

More Information
How is the telephone recorder powered?

By an in-built fully rechargeable lithium battery which provides a massive six (6) months standby per charge.

Doesn't it look odd the box is connected to a telephone socket?

For convenience, plug the black box telephone recorder into a spare telephone socket in a different room.  It does not need to be connected to the main telephone socket.

For example: Most houses have two (2) or more BT sockets for the same telephone line with the main socket in the living room and another telephone socket located upstairs in a spare room.

Can anybody gain access to the recorded telephone calls?

No.  An encrypted layer of security has been implemented by way of a removable key.  When the key is removed from the device, access to the stored telephone calls are made impossible.  The encrypted key uses a unique algorithm and cannot be copied.

What happens if I lose the key?

We require the serial number of the device.  That is the only way to provide a spare key.

I'm not very technical.  Do I need to set anything up?

No.  The telephone recorder is designed without technical skill required.

I have a normal telephone plugged into the BT telephone line socket so there is no spare socket.  Where do I plug the telephone recorder now?

If your BT telephone socket doesn’t already have a spare socket and there are no additional sockets in other rooms, then you will need to acquire a BT Splitter from any phone or computer shop.

Does it record both incoming AND outgoing telephone calls?


Are the telephone recordings clear?


Please Note: This telephone recorder will not cause any interference or noise on the line to which it is connected, however, the close proximity of components within the recorder may cause slight static on the recorded audio files but will not adversely affect the audio recording quality.

I'm being threatened but Im not receiving help and don't know where to turn?

Gathering audio evidence can be used by Police as a valuable aid to act upon.  If you are being bullied, threatened or intimidated over the telephone and you can provide proof with audio recordings it is such an asset.

Do the recordings have a time and date stamp?


How many hours of telephone calls will the recorder store?

The memory capacity will hold 240 hours of total telephone recordings, however, we recommend that you transfer the audio files to your computer on a regular basis to maintain free memory on the recorder.

Technical Info
  • Automatic landline telephone call recorder with encryption key
  • Small black box design
  • Records both incoming / outgoing calls
  • Plugs directly to any standard telephone socket
  • No setup or technical skill required
  • Automatic voltage detection
  • Recording format - WAV
  • Charging time - approx four (4) hours
  • Battery life - approx six (6) months (per charge)
  • Battery capacity - 500 mAh fully rechargeable lithium
  • Storage capacity - 240 hours
  • Dimensions - 65 x 50 x 15 mm
  • Operating system - Windows 98 SE / 2000 / XP / Vista / Windows 7 and above
  • Supplied with Encrypted Black Box Landline Telephone Recorder, USB cable, BT cable and User Guide
  • Ideal for gathering audio evidence of your home / office telephone calls

Note: This unit does not provide a time / date of telephone recording/s.

Note: This unit is not compatible with exchange or PABX systems.

Note: The recording of telephone calls may be illegal in some countries.  Please check your local laws before purchasing and refer to our terms and conditions of sale.

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There is still time to dispatch this product TODAY for delivery tomorrow providing your order is received BEFORE 3:00pm Monday - Friday.  If the order is placed AFTER 3:00pm item/s will be dispatched the next business working day.

For Example:

Order before 3:00pm on Monday for delivery on Tuesday.  Order after 3:00pm on Monday for delivery on Wednesday.

Order before 3:00pm on Friday for delivery on Monday.  Order after 3:00pm on Friday for delivery on Tuesday.

We can deliver on Saturdays providing your order is recieved BEFORE 3:00pm on Friday.


Any order total above £100.00 (Ex VAT) qualifies for FREE shipping in the UK.  If the order total is less than £100 then a shipping fee of £8.40 is applied.

You can upgrade the speed of delivery as early as 10:30am the Next Working Day for the expedited fees shown below.  These fees will also be shown during the Checkout.

Note: If you wish to return an item the upgrade delivery fee is non-refundable in line with our legal Consumer Regulations.


DPD Courier parcels are securely packaged with only your delivery details and without any reference to Online Spy Shop branding.

Royal Mail Special Delivery parcels will have our returns address written on the parcel unless you specifically tell us not to.

All deliveries regardless of the shipping method used will require a signature to release the goods.


FREE delivery by DPD Courier up to 18:00pm.
Add £8.40 for delivery by 13:00pm (Royal Mail Special Delivery)
Add £10.99 for delivery by 12:00noon (DPD Courier)
Add £19.99 for delivery by 10:30am (DPD Courier)


Delivery by DPD Courier up to 18:00pm.
Add £18.00 for delivery on Saturday.  Orders must be received not later than 3:00pm on Friday.


Delivery by FedEx / UPS Couriers depending on destination.
£25.00 Standard fully tracked delivery up to six (6) working days.
£35.00 Express fully tracked delivery up to three (3) working days.


No shipping or delivery charges are applicable.