Recommendation for telephone system

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I am at present on the search for a new telephone system with the following characteristics (so far yet one did not find, which can do everything)

- ISDN/VOIP connection
- DSL-rout or a choice in the net, 1 haven hands, since it goes directly to a SWITCH
- DECT --> Announce of telephones possible (5 pieces)
- Attitude menu into German
- 2 similar telephones
- Remainder over ISDN
- at least. 1 switching contact
- 1 contact for bell

Which still in addition should be which one can adjust telephones over the plant the telephone numbers (meant, I knows at the same time new telephones).

As already said, I found nothing else, what can do all of this in equipment, did not have me the DrayTek VigorIPPBX 2820 looked at, but has Telefonsyncronisierung contained. The Fritz box contained not all desires.

Thanks for a tip

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Moin.
Up to the switching contacts you have the Fritz box 7270 to the selection. However I here already read something from switching contacts over the Fritz box. You must look for possible times. Otherwise these contacts are the KO-criterion for nearly each equipment. Either you turned around a pure TK-plant with contacts, but no VoiP routing in it, or. There one would have possibly which to tinker. If it should be a door opener function, ' s gives meanwhile also solutions over the Fritz box.
Greeting
Stefan

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Thanks for your answer Stephan.
Over the problem I am gestolpert already, use at present nearly only AVM of products, but like already written it is zufriedendstellend for me not yet.

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look times here

http://www.funkwerk-ec.com/prod_elme...27594,194.html

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Telephone system and rout I would separate! Those are two tasks, which cannot have to do directly somewhat with one another and the good single devices also better settle.

For the telephone system you will become fndig with Auerswald. I just see that for the moment an action runs: http://auerswald.de/de/cashback/cashback.htm

The 5020 fulfills, if a TS-module is re-tooled (for the switching contacts and bell), your requirements.

In addition then your DECT comes still another decent ISDN basis for.