That will be a rocky road:
they are out of business for quite some time.
As far as I remember they were OEM importer
of an Italian telecom manufacturer.
Try this address:
ROCOM Energie und Komunikationssysteme GmbH
Lessingstr. 20, D-63110 Rodgau, Germany
Telephon: +49-(0) 61 06- 66 00 - 0
Telefax: +49-(0) 61 06- 66 00 - 66
Hotline: +49-(0) 61 06- 64 60 42
email: rocom_gmbh@t-online.de

Good luck!

Michael


: i search for technical documentation about these type of modem