ISDN telephone system over VPN extend

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Hello of people,

Vorneweg: Why there are no alternative solutions:
* At home we have a class DoppelFlat for 50 countries for operational reasons.
* I possess in my student's digs a telephone connection its assets one however with input clutch smart card to load must.
* Both networks are over two Linux embedded servers and rout by means of VPN connected.

Task:
=> I would like to use that over IP Telefonie available fixed mains connection. The signal is by VPN network are geschleusst.

There a Routing of the ISDN of signal itself as too difficult arranged must probably such a solution over VoIP ago, however I mean not with it any on-line offerer, but in the classical sense telephoning over the network.

Option 1 => Asterisk?
There as mentioned two Linux servers in the net some tasks of house automation take over and still achievement remaining have a only one simple Telefonsignal to routes, would be a possibility.
Then to me however the question arises whether this expenditure is at all necessary.
Nevertheless would a connection to the cable modem have to be realized, thus a ISDN Voicemodem over USB?
And then wouldn't the Eumex300 have to be functioned as Unteranlage and switched behind the Asterisk?
=> Thus two USB ISDN of connections?

Option 2 => The speed haven and Eumex300IP?
Somehow thereby can't a solution be realized? I am not for the moment able the speed haven concerning its menu to through forests, but am these or at all equipment in the conditions VoIP of telephones over the network into the telephone system to be integrated?
All suggestions are welcome, as long as you do not question the sense of this solution type (because of this VPN telephone line I would like not to have to buy necessarily€ 300 TK a plant).

To the telephones:
Likes to me in Hybrid telephone, since I would not like to have two telephones here.
I find the Gigaset S685 IP send completely, even if it is quite expensive.
The question is however whether one can register problem-free the IP of the Asterisk of server with this equipment then also.

Those Hardware:
Server:
1.) Student's digs: one with Linux geflashte Linksys NSLU2 network STORAGE, briefly: Slug
2.) At home: a GuruPlug server plus (DataSheet: http://www.newit.co.uk/assets/files/...erver-Plus.pdf)

Telephone system:
3.) Telephone system: Eumex300IP (two speed haven w500 still lie in the cellar, if which brings?)
4.) Cable ISDN modem (2 ISDN of connections, at the one the telephone system hangs)

The GuruPlug has power and some connections (side 2ff in the pdf above), there the operating system Linux is tidy would have then however a USB Voicemodem (without larger programming expenditure) is integrable also ago and/or. perfectly runs.
For information, on both systems Debian, without restrictions, runs this concerns fully functional distributions, therefore in this scenario also the some makes possible at clearance.

The problem is nevertheless reliably nothing new for you.

Clears up me

Greetz

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Any adapter of ISDN on VoIP take? ' S gives nevertheless enough.

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Thus if IP of telephones lie about, and the VoIP capable plant at the inexpensive ISDN stands.
What speaks against it to carry forward that a IP telephone into the student's digs to in-book itself and from there with standing VPN into the Eumex?
Into the Eumex a connection konfiguieren, and the telephone therein to in-book leave themselves. Wenns a genuine VPN is, is you quasi in the student's digs net-technically in the LAN at home - ev. do not have to be still geforwardet wenns like that is, a few haven.

The Gigaset IP can be implemented marvelously in SIP plants - imemr a VoIP Provider does not have to be in the Internet - has here most diverse on Innovaphone plants to hang.

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That was my first Intension, however I could find here nothing in the menu of the Eumex.
Do you speak of it the Eumex to freetzen? I intended that shortly.

If you nevertheless mean the original firmware of T-Com on the Eumex, it would be class, if you could point me the hidden left to it
Does one have to say perhaps three times on it a knocking and Simsalabim?

Actually it would have to be able to do that.