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Siemens Gigaset DX800A VOIP And ISDN System Phone

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Availability: In Stock
Discount: 44%
You Save: £175.00

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£399.99 £187.49
Customer rating: 4.5/5 out of 2 reviews.

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Product Description

The high-end hybrid desktop phone for VoIP and ISDN or fixed line calling.


The Gigaset DX800A all in one is the professional multiline desktop phone for small offices and home offices. From its comfortably modern design to its large 3.5 TFT colour display, this corded phone has executive chic and the business-like functionality to match. Being a hybrid phone means the Gigaset DX800A all in one is truly flexible and can be configured to either IP with ISDN, or IP with fixed line. Because it’s a multiline phone it can support up to 4 parallel calls and expand with multiple handsets – up to 6 in total. Managing contacts is easy with up to 1.000 vCard entries. You can synchronise with your PC to access Outlook contacts and locate details easily with auto look-up4. The Gigaset DX800A all in one has best-in-class hands-free for wired or wireless hands-free talking. And what’s more, every single conversation is heard in exceptional High Definition sound quality. With its range of energy-saving features and radiation-free mode, this telephone is better for the environment. And thanks to three integrated answering machines with a combined recording time of up to 55 minutes, the Gigaset DX800A all in one is equipped to support small businesses.

With its executive features, VoIP with ISDN or fixed line and large colour display, the Gigaset DX800A all in one is ideal for small offices and home offices. This multiline desktop phone is capable of meeting the daily demands of up to four professionals.
The future is calling
Because the Gigaset DX800A all in one is a hybrid desktop phone, it is a completely flexible Next Generation-ready solution and a real investment for the future. When you configure this telephone you choose between VoIP and regular fixed line or VoIP and ISDN, based on the needs of your small office or home office. And as the needs of the future change, the Gigaset DX800A all-in-one can be reconfigured as required. Being a multiline telephone means it supports up to 4 calls in parallel; ideal for busy environments and if you ever need to expand your horizons with multiple handsets the Gigaset DX800A all-in-one supports up to 6.

Professional SOHO solution
The Gigaset DX800A all in one manages your contacts professionally. As well as providing an address book for up to 1.000 vCards, this valuable multiline desktop phone links to your Outlook contacts. When someone in your small office or home office needs to locate the details of other businesses, the Gigaset DX800A all in one saves time with access to an online net directory and Yellow Pages search. With auto look-up4 it’s even easier to find the details needed. The online benefits of this hybrid desktop phone do not end there; get useful Gigaset info services direct to your large colour display – RSS news feeds, a weather forecast and more. Also receive email notification, showing details of the sender, subject, time and date. And with Link2Mobile Bluetooth technology you can make and receive mobile calls from the comfort of the Gigaset DX800A all in one, whenever it suits you.
Get the message
The three separate answering machines of the Gigaset DX800A all in one, with a combined recording time of up to 55 minutes, mean your associates will never be cut short, even when leaving detailed messages. This dependable multiline desktop phone does all it can to let you know when new messages are waiting, from notification on the large TFT colour display to sending an SMS. And for the convenience of everyone that uses your small office or home office, the answering machines of the Gigaset DX800A all in one can even record calls
Environmental efficiency

The Gigaset DX800A all in one has an energy-saving power supply, meaning it consumes less electricity saving you money and helping the environment. For further energy savings, a time controlled night mode switches off the display when not in use. When no cordless handsets are registered to the base station the DECT power is switched off completely. When handsets are registered, the transmitting power to the base station is variably reduced depending on their distance apart. You can also reduce the transmitting power by 80% by selecting the ECO Mode. Furthermore, radiation-free ECO Mode Plus turns off the transmitting power when the handset is in standby. Rely on the Gigaset DX800A all in one for professional energy-efficiency.
With its smart design, HD sound and flexible configuration – VoIP with ISDN or fixed line – the Gigaset DX800A all in one is a real investment for the future and the savvy choice for your professional small office or home office.

Key Features:

Display and Keypad

  • Clearly structured menu
  • Graphical Display
  • Main Display Type : Full Colour
  • Answering machine keys
  • Brilliant 3.5inch TFT 320x240 color display
  • Easy softkeys handling
  • Easy-to-use text-based menu
  • Navigation key
  • Message indicator key | Mute key
  • Configurable function keys
  • Display of caller’s number (CLIP) | picture (Picture CLIP)
  • HDSP internal | external
  • Speakerphone - Advanced handsfree
  • Ringer melodies | polyphonic | real sounds | downloadable
  • Individual ringer melodies for VIP entries
  • Volume Control : Volume control up / down
  • Antenna: Integrated on base
  • GAP Compatible
  • Pulse dialing

Call Management

  • Caller ID on call waiting
  • Conference Call
  • Microphone mute
  • Intercom
  • Two-way recording
  • Call Diversion
  • Call Duration
  • Call History
  • Call Transfer
  • Music on hold
  • CTI for direct dialing from Outlook contacts directly via PC
  • Phonebook transfer: via DECT | via Bluetooth | via LAN
  • Address data synchronized with Microsoft Outlook
  • vCards 500 entries
  • Phonebook : 1000 names and numbers
  • Up to 250 vCards with picture
  • Last dialed 20 numbers
  • Number of parallel calls: analogue | ISDN | VoIP -  1 | 2 | 4
Handset Features
  • Bluetooth Functionality
  • Plug-and-play via installation wizards
  • Date reminder function | alarm call
  • Calendar
  • Multi handset capability : Up to 6 handsets
  • Three different phone numbers for each contact
  • Name and caller ID
  • Live recording of calls
  • Multilingual menu for up to 20 languages
  • Time, Date and Call duration displayed
  • WEB-Interface | save and load of configuration settings from/to PC
  • Equipped with speech transmission encryption

Messaging functions

  • Up to 640 characters SMS
  • E-mail
  • E-mail notification

Answering Machine Features

  • Number of answering machines - 3
  • Open listening at base station
  • Recording time up to 55 min.
  • Plug & Play answering machine
  • Playback of messages from external phone
  • Predefined | individual announcements
  • PIN-protected Mailbox
  • Date and time announcement
  • Timed change between predefined and individual announcements
  • AM control via handset | via base station
  • Protection of recordings against power failure

Features with more than one handset

  • Expandable to up to 6 handsets
  • Selective internal calls
  • Internal transfer of external calls
  • Parallel calls internal - 2 | external - 4

VoIP Features

  • Six VoIP accounts
  • Multiple provider configuration

IP net features and services

  • Online Phonebook
  • VoIP profiles for download
  • VoIP protocol SIP
  • Codecs G.711, G.722 | G.726 | G.729
  • QoS: ToS. Diffserv
  • Firmware update via Internet

Handset Dimensions & Other Facts:

  • Up to 80% less energy consumption
  • Automatic reduction of the emitted power
  • Standards DECT | GAP | ISDN | Bluetooth | CatIQ certificated
  • Headset connection: corded 2,5 mm | DECT | Bluetooth
  • Fax connection port
  • LAN switch:100 Mbit
  • Linux based operating system
  • Link2mobile |Two parallel Bluetooth connections
  • Radiation-free ECO Mode Plus
  • PBX compatible
  • Dimension:(W x H x D): 108 x 263 x 168mm
  • Weight: 998 grams
  • Two year warranty

Discount: 44%
You Save: £175.00

Product Guide

Download the Siemens Gigaset DX800A VOIP and ISDN System Phone User Guide. (1.34 MB)

2 Siemens Gigaset DX800A VOIP and ISDN System Phone reviews

Average Customer Review: 4.5/5
Handset features
Value for money
Sound quality
Ease of set up/use
Battery life


1 of 1 people found the following review helpful
28 Oct 2012
Brilliant phone - awful support Anonymous 4.5/5 roll over for details

Good points Handsfree audio quality is outstanding
Second (VOIP) line and sync features should be as well but see below

Bad points Support from Siemens is dreadful. Yes they reply to e-mail but after 2 weeks their eastern european support service cannot get the 'Sync with Outlook' feature working and only offer standard 'text book responses regardless of question asked.

BT (British Telecom) do not have the technical competance in their India support centre to advise the neccesary setup data to activate the VOIP line.

Other thoughts

Great phone, shame about the support

12th Dec 2011

BT is very secretive about access data. However it is well documented even pon the BT forum how to set-up the line on routers and get to the information you need. It's dead simple and you do not need to speak to any support.
But why use a relative unattractive BT service. National calls are only free in the evening and weekend and for one hour. Otherwise their charges are very high for a VOIP service.
Although you can , on demand, received a localised number. Normally they give you an 0500 number and if you leave BT internet service you loose the so called free service anyway.
Have a look at instead
This is a German long established I have been using since the broadband exists. You can choose either an 0845 number, which I would't or get offered a localised STD code depending on the address you type in..
The number is free for life. All calls all the sipgate customers are completely free, never mind which countries telephone number they have.
Also there are lots of payable options to setup a big phone center with various numbers.
The basic free service is fully adequate you can make and receive calls/fax from any phone line in the world including mobiles or other VOIP services. Sipgate Germany even offers a 0500 number you can use to make all linked phone ring at the same time. You can pick up the call on your normal BT line, Mobile phone or computer. Whichever you just currently happen to be nearest too.
So this hopefully will be available soon on their UK website.
The service is worthwhile, couldn't fault it and hence fully recommend it.
Call charges are low, with NO connection charge. I also like the feature that it allows you to choose by how much money you load up your account and at what level this automatic feature is triggered. Never get cut off because there are no funds in the account.
This is giving you for free what skype is charging a fee for (your own phone number) and BT only offers to you if you are their Broadband customer.
Got to be worth a thorough checkout about what it can do for you personally. Enjoy ... like me :-)
27th Jan 2012

Agree, is a good place for a VOIP phone number.
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1 of 1 people found the following review helpful
21 Nov 2012
Excellent home business phone Fonant 5/5 roll over for details

Good points Good speakerphone sound quality
Internet phone and landline, with separate answerphones
Large directory for contacts
Very clear display, good buttons

Bad points None

Other thoughts

If you work from home, and could do with a business number, grab a free one from SIPgate or similar, and this phone will do the rest!

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Customers who bought this item also bought:

Siemens Gigaset C59H Additional Handset

Siemens Gigaset SL78h Additional Handset

Plantronics Discovery 975 Bluetooth Headset

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