The Panasonic KX-T7731 and Panasonic KX-T7730 system phone are compatible with all Panasonic phone systems. They work seamlessly with the analog Panasonic phone systems such as the KX-TA824 and KX-TAW848. For digital Panasonic phone systems, you simply need to put a card into the phone system that allows analog phones to work on a digital system. The digital systems that are most commonly used are the Panasonic KX-TDA50, Panasonic KX-TDA100 and Panasonic KX-TDA200 (however we recommend using digital phones on digital phone systems. These include the KX-T7600 series phones or the KX-T7400 series phones. The KX-T7600 series phones are used with the Panasonic KX-TDA50, Panasonic KX-TDA100 and Panasonic KX-TDA200 digital phone systems. The Panasonic KX-T7400 series phones are used with the KX-TD1232 digital phone system, which has been discontinued but remains popular due to its high level of functionality).

The Panasonic KX-T7730 phone comes in either off-white or black. The main difference between the KX-T7730 and KX-T7731 is the lighted display. The Panasonic KX-T7731 has a display that has a backlight, so if you are in a dark office or room then the KX-T7731 provides luminescence. The KX-T7730 lacks this backlight, but it still has the display. This display is a single line display, which is most significant when talking about caller ID. Both the Panasonic KX-T7731 and Panasonic KX-T7730 are caller ID equipped. The single line display basically means you could see either the callers name or their phone number. This is distinct from the Panasonic KX-T7736, which has a 2 line display; with the KX-T7736 you could see the callers name and number. If you have a KX-T7700 series phone, it means you have either a Panasonic KX-TA824 or Panasonic KX-TAW848 phone system, both of which come with caller ID. The Panasonic KX-TA824 comes with caller ID on all 3 lines. If you decide to expand the KX-TA824 phone system, you need an extra caller ID card so you can have caller ID on 6 or 8 lines. The Panasonic KX-TAW848 phone system does not come with caller ID so you would need to get a card to facilitate your needs accordingly.

The KX-T7700 series includes 4 telephone models and one DSS console, all
available in white and black, providing numerous options to suit each
individuals needs and budget. The KX-T7720, KX-T7730, KX-T7740 and
KX-T7750 are all designed for use with the Panasonic Advanced Hybrid
Telephone Systems and our Digital Super Hybrid systems, allowing you to
upgrade the system without changing out the telephones. The top of the line,
24-button, 3-line backlit display KX-T7735 telephone was designed to work
exclusively with our KX-TA624-4.
Programmable CO and Feature Buttons
Each of the four telephone models in this series are equipped with 24 programmable
buttons that can be programmed for one touch access to features
and automatic dialing. In addition, 12 of the 24 programmable buttons are
also equipped with LED’s and can be programmed to direct select a Central
Office line or a Direct Station Select (DSS)/Busy Lamp Field (BLF).
Auto-Answer Speakerphone
An Auto-Answer Speakerphone is a valuable asset when it comes to
increasing efficiency. Featured on the KX-T7720, KX-T7730 and KX-T7735,
this handy speakerphone lets you set the phone for automatic hands-free
answering of intercom calls. The phone will no longer be an annoying
interruption! You can now take calls without putting your work on hold.
Multi-Purpose, Backlit, Alphanumeric Display
The KX-T7730 and KX-T7735 both feature a backlit LCD display. The display
shows the time, day, month, dialing number and call duration of external calls.
On intercom calls the caller’s extension will appear on the LCD display before
the phone is answered. The KX-T7730 has a 1-line LCD display, which will
show the caller’s name and number alternately.
Name and Number Caller ID
When connected to a KX-TA624-4 Advanced Hybrid System equipped for
Caller ID* the KX-T7735’s 3-line Backlit LCD display will show the outside
caller’s name and number simultaneously.
Additionally, all Panasonic KX-T7700 Series phones come with a euro-style
handset. Sleek and stylish with a low-profile design, this type of handset is
comfortable and easy to use.
For an efficient communication system with the flexibility to adapt as your
needs change, choose Panasonic KX-T7700 Series phones.
■ The base can be adjusted to two different positions for ease of use on the
desk, or it may be mounted on the wall.
■ 2.5 mm Headset Jack
■ The KX-T7730 and KX-T7735 both have a navigation key to adjust the LCD
contrast, handset/headset volume and speaker volume.