| Phone support 24 hours a day | (0316) / 8057 857 |
| Business Hours Customer Service Centre: Andreas-Hofer-Platz 15, A-8010 Graz Mo., Tue., We. and Fr. from 7.30 a.m. to 3.00 p.m. Thursday 7.30 a.m. to 6.00 p.m. | |
Dipl.-HTL-Ing. Erich Slivniker Construction & Business | (0316) / 8057 305 |
| Dipl.-HTL-Ing. Max-Peter Fellner Customer & Connection Service | (0316) / 8057 660 |
| Ing. Eduard Rudolf Connection | (0316) / 8057 309 |
| Dipl.-WI(FH) Peter Schlemmer Construction & Business | (0316) / 8057 542 |
Ing. Peter Gangl Planning | (0316) / 8057 543 |
Ing. Siegfried Fassolter IT-Service | (0316) / 8057 612 |
