3Com DIGITAL MODEM - page 26

Configuring the 3Com Impact Digital Modem 2-9
5Select the type of switch, as specified by your telephone
company, from the Telephone Company Switch
drop-down list box.
6Click in the Telephone Number field in the Number 1 area
and enter the telephone number to which your digital
modem is connected.
7Click in the Service Profile Identifier (SPID) field and enter
the corresponding SPID for the telephone number you
entered in the previous step.
You should have received this SPID from your telephone
company.
CAUTION: If the ISDN line has been configured with only one
telephone number (Point-to-Point), do not include the SPID.
8Specify which device should receive the calls coming to
Telephone Number 1.
You can select Phone Port or Internal Fax/Modem. If your
model has the internal analog fax modem installed (Models
3C872 and 3C877), you can select both.
If both boxes are checked, the internal analog fax modem
and the phone will both ring, enabling you to answer using
either device.
9If you have a second telephone number associated with
your ISDN telephone line (some telephone companies
require two), enter the number and corresponding SPID in
the appropriate fields in the Number 2 area.
10 Specify which device should receive the calls coming to
Telephone Number 2.
11 Click the Configure button to download the parameters
listed in steps 5 through 10 to your digital modem’s
S registers.