My Fritz box hair dryer 7050 and 5050 cut last numbers off with IWF choice

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Hello,

I have a problem for which I after hours trying, Google/forum search do not get ahead. I hope, I look only for the wrong terms and me can be helped.

Both at my Fritz box hair dryer 7050 and 5050 when using IWF/impulse choice procedure the selected call number is always cut off before the end.
In accordance with “call list” of the box is i.a.R. after 7 numbers the case, sometimes 8 numbers in the call list are stored.
It is not recognizable for me a necessary sample. It does not seem to be because of the call number, which I can vary. The error always arose.

This happens not only with different old IWF telephones, but also a new telephone with change over switch IWF, the available, and DTMF/MFV. If this telephone is posed on MFV, however completely one selects.

This problem even arises, if the telephones not directly to the “HAIR DRYER” - connections the Fritz are attached, but to different tried ISDN plants, which to the S0 the Fritz goes.
For ISDN I have the reference with #96*2* (and/or. even #96*0*) obeys, which makes however no difference. With the direct test telephone <-> HAIR DRYER is taken the ISDN plant off from the S0 the Fritz.

Both Fritz in the meantime several times by means of the Webschnittelle and #99 ** or #991*15901590* were put back to factory settings.
Whether also or after it the problem arises to made configuration!
That is called even if only one fixed mains connection is available.
(Otherwise I configured to Fritz in such a way that over fixed net is to be always rausgewaehlt)

Both Fritz have the current in each case AVM firmware drauf. With the 7050 I manually pulled also again caution for the sake of the current firmware of AVM and installed.
With the 7050 I activated telnetd, around in a contribution the specified
to call dtrace - s - *, for announcement of the ISDN call number transmission.
Unfortunately the command is found not of ash and manual Stoebern in /bin, /sbin brought also no success.

If I put the telephones in directly at the T-Net-connection/fragment, everything functions as used.

The only one, which I could not exchange apparently, is the T-Net-connection, to without Fritz is completely selected and… me.
Possibly thus here still someone has a reference!

Best thanks in advance!