Best Isdn Telefon 2026

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Last Updated - 03.02.2026

Best Choice

01

Deutsche Telekom

Telekom T-Concept PA624I (Hands Free Functionality, ISDN Port)

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9.9

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Listen to and record a call thanks to the integrated answering machine is possible
In the event of a power failure, you remain accessible (emergency operational)
Easy to use thanks to menu-controlled user guidance, quick first commissioning thanks to installation wizard
Corded phone with display for universal connection
Box contents: PA624i desk telephone with integrated answering machine, ISDN connection cable, operating / short operation instructions (English language not guaranteed)

168,90 €
02

Gigaset

Gigaset SX810 isdn stahlgrau

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9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Up to 13 hours talk time
Box contents: device, battery, power cable, instruction manual (English language not guaranteed)
Bluetooth headset interface
Backlit Keyboard
4.6 cm (1.8 inch) colour display with 65,000 colours

138,90 €
Value for Money

03

Deutsche Telekom

Telekom Sinus Telephone Set

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16% Off
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Standby time 245 hours/talk time 18.5 hours.
Phonebook can be synchronised among all Sinus 207 handsets
Large illuminated monochrome graphic display
Easy menu navigation
Blue Angel certificate: official environmental label of the German Environment Agency

76,40 € 90,98 €(16% Off off)
04

Gigaset

Gigaset SX353 ISDN Black

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Up to 8 handsets or Gigaset M34 USB
Integrated answering machine
Illuminated 4-line graphic display
Bluetooth interface for connecting your mobile phone, headset or PC
A / b connection e.g. for fax and USB interface

118,90 €
05

Gigaset

Gigaset Desk 800A Corded Telephone with Answering Machine - Three-Line LCD Display - 5-Way Navigation Button - Hands-Free Function - MFV or Pulse Selection Black [German Version]

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16% Off
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quality for every requirement – the latest technologies and the highest quality characterise the Gigaset phones – ideal for home or office – the DESK 800A can be used as a desk phone and as a wall phone
Flexible telephoning – The DESK 800A has a hands-free function with 7 volume levels – the RJ9 allows you to connect a headset – thanks to the EU standard (ITUT P,370), the device is hearing aid suitable
Easy installation – connect with analogue phone connection and start calling directly, supports MFV or pulse selection, with 10 adjustable melodies and the storage option of up to 200 contacts
Do you have any questions about this product? Contact Gigaset customer service at 02871-912 912 (for your provider's landline tariff)
Communicative - Three-line display with LED backlight, provides an overview of call time, name and number of the caller - the answering machine records up to 50 minutes of call time - the call list stores the 50 last entries. Only compatible in Germany - more information on the Gigaset homepage.
Box contents: 1 x DESK 800A desk telephone, 1 x telephone connection cable (a/b), 1 x power supply, 1 x user manual (English language not guaranteed), 1 x handset connection cable, 1 x stand

59,00 € 69,99 €(16% Off off)
06

Gigaset

Gigaset Desk 800A Corded Telephone with Answering Machine - Three-Line LCD Display - 5-Way Navigation Button - Hands-Free Function - MFV or Pulse Selection Black [German Version]

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quality for every requirement – the latest technologies and the highest quality characterise the Gigaset phones – ideal for home or office – the DESK 800A can be used as a desk phone and as a wall phone
Flexible telephoning – The DESK 800A has a hands-free function with 7 volume levels – the RJ9 allows you to connect a headset – thanks to the EU standard (ITUT P,370), the device is hearing aid suitable
Easy installation – connect with analogue phone connection and start calling directly, supports MFV or pulse selection, with 10 adjustable melodies and the storage option of up to 200 contacts
Do you have any questions about this product? Contact Gigaset customer service at 02871-912 912 (for your provider's landline tariff)
Communicative - Three-line display with LED backlight, provides an overview of call time, name and number of the caller - the answering machine records up to 50 minutes of call time - the call list stores the 50 last entries. Only compatible in Germany - more information on the Gigaset homepage.
Box contents: 1 x DESK 800A desk telephone, 1 x telephone connection cable (a/b), 1 x power supply, 1 x user manual (English language not guaranteed), 1 x handset connection cable, 1 x stand

34,79 €
07

Gigaset

Gigaset CX253 isdn black

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Wireless Internet access with USB adapter
SMS Enabled
Illuminated 4-line graphic display
Hands-free calling and listening
Expandable up to 6 handsets

54,95 €
08

Gigaset

Gigaset DX600A ISDN / DECT Telephone (with 3 Answering Machines - Cord Phone with Large Display) Titanium

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8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

For more communication - With the ISDN connection, you can operate various online services - Internet calls can be made and up to 4 calls can be made at the same time
For flexible calling - The phone can be extended to a wireless ISDN system - Up to 6 Gigaset handsets can be connected - For making calls in any room
Easy installation - The phone is easy to operate and configure. You can use the installation wizard or the WEB interface for this purpose
Do you have any questions about this product? Contact Gigaset customer service at 02871-912 912 (for your provider's landline tariff)
Box contents: 1x Gigaset DX600A ISDN phone, 1x power supply, 1x ISDN cable, 1x Ethernet cable, 1x fax cable, 1x CD ROM with PC software, 1x user manual
3 individual answering machines - The integrated AB can be divided into three phone numbers - It has a recording time of 55 minutes, remote queries of messages via PIN possible

76,34 €
09

Gigaset

Gigaset AS690A - cordless phone with 1 handset - DECT phone with hands-free function, large display, large buttons - landline phone, black

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8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

gigaset From phones landline phone simple phone handsets with answering machine dect analogue phone easy operation home phone large display glossy phone black graphic display telephone wireless
Strong functions: integrated answering machine with up to 20 minutes recording time, brilliant sound quality (even when hands-free calling), 5-level volume control, call protection for 32 lock numbers
Quality made in Germany – designed and manufactured in Germany – the environmentally friendly Eco Dect technology ensures reduced energy consumption
Easy installation – simply connect the base station to the wall phone socket and start making calls directly – benefit from a quick and easy setup of your new phone
Do you have any questions about this product? Contact Gigaset customer service at 02871-912 912 (for your provider's landline tariff)
Box contents: 1 x base station Gigaset AS690A with integrated answering machine, 1 x Gigaset AS690 handset, 1 x power supply, 1 x telephone connection cable, 2 x AAA batteries (NiMH)
A reliable companion – the Gigaset AS690A impresses with a large, high-contrast display and ensures best readability thanks to the extra large number display in dial mode. Only compatible in Germany - more information on the Gigaset homepage.

47,99 €
10

Gigaset

Gigaset AS690A - cordless phone with 1 handset - DECT phone with hands-free function, large display, large buttons - landline phone, black

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

gigaset From phones landline phone simple phone handsets with answering machine dect analogue phone easy operation home phone large display glossy phone black graphic display telephone wireless
Strong functions: integrated answering machine with up to 20 minutes recording time, brilliant sound quality (even when hands-free calling), 5-level volume control, call protection for 32 lock numbers
Quality made in Germany – designed and manufactured in Germany – the environmentally friendly Eco Dect technology ensures reduced energy consumption
Easy installation – simply connect the base station to the wall phone socket and start making calls directly – benefit from a quick and easy setup of your new phone
Do you have any questions about this product? Contact Gigaset customer service at 02871-912 912 (for your provider's landline tariff)
Box contents: 1 x base station Gigaset AS690A with integrated answering machine, 1 x Gigaset AS690 handset, 1 x power supply, 1 x telephone connection cable, 2 x AAA batteries (NiMH)
A reliable companion – the Gigaset AS690A impresses with a large, high-contrast display and ensures best readability thanks to the extra large number display in dial mode. Only compatible in Germany - more information on the Gigaset homepage.

19,66 €