Wieder im Büro geht die Suche weiter, habe heute im Internet folgendes Gefunden. Kann vielleicht von euch jemand damit etwas anfangen?

This worked for me in 10g R1:

insert into cs_srs values (
'DHDN Soldner Berlin (EPSG 3068)',
81989002,
81989002,
NULL,
'PROJCS ["DHDN / Soldner Berlin",
GEOGCS ["",
DATUM ["",
SPHEROID ["Bessel 1841", 6377397.155000, 299.152813],
582.000000, 105.000000, 414.000000, -1.040000, -0.350000, 3.080000, 8.300000],
PRIMEM [ "Greenwich", 0.000000 ],
UNIT ["Decimal Degree", 0.01745329251994330]],
PROJECTION ["Transverse Mercator"],
PARAMETER ["Central_Meridian", 13.6272037],
PARAMETER ["Latitude_Of_Origin", 52.41864828],
PARAMETER ["False_Easting", 40000.00],
PARAMETER ["False_Northing", 10000.00],
UNIT ["Meter",1.000000000000]
]',
null);

select sdo_cs.validate_wkt(81989002) from dual;

select sdo_cs.transform(sdo_geometry(2001,8192,sdo_point_type
(13.6,52.4,null),null,null),81989002)
from dual;

select sdo_cs.transform
(SDO_GEOMETRY(2001,81989002,SDO_POINT_TYPE
(38098.5904,8073.54076,NULL),NULL,NULL),8192)
from dual;

..Ist das was brauchbares?