Multi-Tech Systems MT128ZLX-NT - Manual (Page 107)

MultiMobile MT128ZLX User Guide 4: Windows NT Driver Procedures
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20. The Add RAS Device screen appears.
Highlight “ISDN1 – MT128STZLX” and click OK.
21. At the Remote Access Setup screen, select Add again.
22. The Add RAS Device screen appears again.
Highlight “ISDN2 – MT128STZLX” and click OK.