1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your JACOB JENSEN T-1 Telephone 1. Designed with a focus on minimalist aesthetics and functionality, the T-1 offers reliable corded telephone communication.

Figure 1.1: The JACOB JENSEN T-1 Telephone 1, showcasing its sleek design and integrated stand.
2. Setup
2.1 Unpacking
Carefully remove all components from the packaging. Ensure the following items are present:
- JACOB JENSEN T-1 Telephone unit
- Handset cord (coiled)
- Telephone line cord
2.2 Connecting the Telephone
- Connect one end of the coiled handset cord into the port on the telephone unit and the other end into the handset.
- Connect one end of the telephone line cord into the designated port on the telephone unit.
- Plug the other end of the telephone line cord into a standard telephone wall jack.
2.3 Placement Options
The JACOB JENSEN T-1 can be placed on a flat surface using its integrated stand or mounted on a wall.
- Desk Placement: Position the telephone on a stable, flat surface. The integrated stand allows for an optimal viewing and operating angle.
- Wall Mounting: For wall mounting, use appropriate screws (not included) to secure the telephone to a wall. Ensure the mounting surface is sturdy.

Figure 2.1: The JACOB JENSEN T-1 Telephone 1 shown in a wall-mounted configuration.
3. Operating Instructions
3.1 Making a Call
- Lift the handset from the telephone unit.
- Listen for a dial tone.
- Enter the desired telephone number using the keypad.
- Wait for the call to connect.
- To end the call, replace the handset on the telephone unit.
3.2 Receiving a Call
- When the telephone rings, lift the handset to answer the call.
- To end the call, replace the handset on the telephone unit.
3.3 Keypad Functions
The telephone features a single keypad for dialing and special functions. The keypad is typically located on the underside or within a pull-out section of the main unit.

Figure 3.1: Detailed view of the JACOB JENSEN T-1 telephone keypad, showing numerical and function buttons.
- Numerical Keys (0-9): Used for dialing phone numbers.
- * (Star) and # (Pound) Keys: Used for special services or menu navigation as required by your telephone service provider.
- M1, M2 Keys: These are typically memory keys for storing and quickly dialing frequently used numbers. Refer to your service provider's instructions for programming these keys if supported.
- R (Recall) Key: Used for accessing network services such as call waiting or transferring calls.
- P (Pause) Key: Inserts a pause in a dialed number, useful for dialing through automated systems.
Note: This model does not support Caller Identification (Caller ID) display.
4. Maintenance
4.1 Cleaning
To maintain the appearance and functionality of your telephone:
- Wipe the exterior surfaces with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or strong chemicals, as these may damage the finish.
- Ensure the telephone is disconnected from the wall jack before cleaning.
4.2 Storage
If storing the telephone for an extended period, disconnect it from the telephone line and store it in a cool, dry place away from direct sunlight and extreme temperatures.
5. Troubleshooting
If you experience issues with your JACOB JENSEN T-1 Telephone 1, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No dial tone | Telephone line cord is loose or disconnected. | Ensure all telephone cords are securely plugged into the telephone unit and the wall jack. |
| Cannot hear or be heard | Handset cord is loose or damaged. | Check the handset cord connections. If damaged, replace the cord. |
| Telephone does not ring | Ringer volume is set to off (if applicable). | Check for a ringer switch on the unit and ensure it is set to an audible level. |
| Buttons not responding | Keypad may be dirty or damaged. | Gently clean the keypad area. If the issue persists, contact customer support. |
If the problem persists after attempting these solutions, please contact JACOB JENSEN customer support or your telephone service provider.
6. Specifications
| Feature | Specification |
|---|---|
| Brand | JACOB JENSEN |
| Model Number | JJT-1 |
| Dimensions (L x W x H) | 7.87 x 1.77 x 2.76 inches |
| Item Weight | 1.03 pounds |
| Color | Black and Silver |
| Telephone Type | Corded |
| Power Source | Corded Electric (Line Powered) |
| Dialer Type | Single Keypad |
| Multiline Operation | Single-Line Operation |
| Caller Identification | No |
7. Warranty and Support
For information regarding the product warranty, please refer to the warranty card included with your purchase or visit the official JACOB JENSEN website. For technical support or service inquiries, please contact JACOB JENSEN customer service through their official channels.
Website: www.jacobjensen.com (Please verify the official website for the most current information.)