Multi-Tech Systems MT128ZLX-NT - Manual (Page 112)

MultiMobile MT128ZLX User Guide 4: Windows NT Driver Procedures
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2. The MultiMobile MT128STZLX Setup screen will appear.
3. Enter the information needed in each field of the Line Setting pane.
Switch Type: See listed options.
Phone Numbers: B1 number and B2 number
SPID: Needed only in the U.S. and Canada.
B-Channel Speed: 56kbps or 64 kbps
Analog Encoder: For Net3 or ETSI, use A-law voice encoding.
For other switches, use Mu-law voice encoding.
Click OK.
At the Network screen, click Close.
When prompted to reboot, click Yes.