| model name | description | filename |
| Handbuch | release notes of all releases incl. v4.26 | README.TXT |
| Software | ZyXEL ISDN Konfigurations Manager
v3.24.de ZyXEL ISDN Konfigurations Manager v3.27.de Configuration-Manager for Apple |
ZyICM324.de.zip ZyICM327.de.zip Config-Manager_v2.04 |
| OP_E OP_E OP_G |
Firmware EuroISDN
"DSS1" v4.26 (with CLIP) Firmware EuroISDN "DSS1" v4.22 (without CLIP) Firmware German "1TR6" v4.11 |
op_e426.zip op_e422.zip op_g411.zip |
| Drivers | Windows 9x/NT5 (W2K) Windows NT 4.x |
mdmzyxop.zip mdmzyxop.zip |
| Tips zu ISDN-TAs | AT$ Omni Plus | MDMZyx |