Multi-Tech Systems MT128ZLX-NT - Manual (Page 142)

MultiMobile MT128ZLX User Guide 4: Windows NT API Usage
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17. Click on the Configure button. The Multiple Line Configuration screen appears. For this example,
highlight RVS ISDN V.120 #2 (COM4) and click the check box.
Click on the Phone Numbers button.
18. The Phone Numbers screen will appear.
In the New phone number field, type in the phone number. (In this example, both ISDN lines use the
same phone number. In some cases, a separate phone number is used for each ISDN connection.) Click
Add
. The new phone number will appear in the Phone numbers field. Click OK.