COMfortel® Xtension300

Article number 16584

Add-on module for the COMfortel 2600, 2600 IP, 3200, 3500 and 3600 IP telephones with 30 additional, freely programmable function keys.


  • Stable mechanical connection with special fasteners
  • Can be expanded to max. three add-on modules
  • 30 keys each with two levels and multi-coloured LEDs for 60 (system) functions and speed dialling programmable
  • Second function level can be accessed by double-clicking or simultaneously holding down the shift key
  • Convenient configuration and creation of the key descriptions via the telephone's web server
COMfortel® Xtension300
COMfortel® Xtension300
1 / 2

The 15 freely programmable keys on the basic device are not enough? Do you need additional function keys so you can use SIP or system functions at the touch of a button? Then extend your COMfortel telephone easily with up to 3 COMfortel Xtension300 key extension modules. The maximum extension provides you with up to 210 function keys with which you can easily and clearly perform speed dialling or other functions.


Features & technical data

Everything you need to know about our products comes now. Scroll down for more information.

Phone Features

  • 30 keys and LEDs for 60 functions and direct dialling programmable
  • All keys either with two function levels
  • All LEDs multi-coloured
  • Second function level either via double-click or common shift key
  • Automatic generation and printing of key labels directly via configuration sotfware

Supported communication platforms

  • COMfortel 2600
  • COMfortel 2600 IP
  • COMfortel 3200
  • COMfortel 3500
  • COMfortel 3600 IP

Please note: information depending on the configuration level of the system. For detailed information please refer to the datasheet. Subject to modification.

Technical Highlights
Dimensions Height (mm) 68 / Width (mm) 120 / Depth (mm) 210 / max. Height (mm) 110
User elements Function keys 30
Operating voltage via the module interface of the Connected COMfortel phones or a separate Power supply (COMfortel XT-PS)
Colour black
Casing material plastic
Weight (g) Phone 310
LEDs multicolored / 30
System connection Ethernet 10/100 Base-T (10/100MBit/s, RJ-45 twisted pair)
Delivery scope
  • Basic unit COMfortel Xtension300
  • Connection cable RJ11/RJ10 (length approx. 16 cm)
  • Connector including 2 attachment screws

Support & downloads

Do you need help with one of our products? Do you need the latest download?
Follow the link to our Service Portal.

To our service area

Datasheet download

Get a detailed overview of our products in only one document.



Compatible products


Telecommunication solutions for trade and production – Joinery

Customised for the requirements of trade
Sector Employees
Trade and production 14
John F., Independent Master Carpenter with 14 employees

"What does a craft workshop need a PBX for? Probably to ensure the same thing that everyone wants: to be contactable any time, anywhere, to hear from the ringtone whether it is a private or business call, answering machine at least for the foremen, etc. You would have to ask my secretary if there's anything else I've missed that it can do. All I know is that she is absolutely thrilled with her desk phone with lots of keys and a large colour display (COMfortel 2600 IP with Xtension300). We now have eight cordless telephones (COMfortel M-100) at the start that vibrate and flash when there is an incoming call – this is recognisable everywhere, even if a saw is being used nearby. However, the engineer who set up the system (COMpact 4000) was something of an experimenter. He connected a motion detector to our door terminal system and knew a trick enabling us to switch the alarm system on and off via the telephone. This means that if an assembly group returns late in the evening, for example, I can 'release' the door from my mobile telephone without the alarm going off. For this alone it has already been worthwhile."

Sales partners

Following partners do not only know the FONtevo products but as well the country-specific characteristics you will always find in telecommunications. Here you will get the matching products with the adaptations for the telephone network of the relevant country plus support if questions will come up.

Find your partner