3Com ISDN Modem User Manual page 22

1-8 C 1: I
HAPTER NTRODUCTION
you ordered one ISDN telephone number, write 1. If you
ordered two ISDN telephone numbers, write 2.
Ordering two ISDN telephone numbers allows you to conduct
two simultaneous calls on both analog phone ports.
ISDN Telephone Number 1. Write down your ISDN
telephone number provided to you by the telephone
company ISDN representative.
ISDN Telephone Number 2. Write the second ISDN phone
number if you ordered two ISDN telephone numbers for your
line.
SPID Number. If required by your telephone company, fill in
the SPID number for each ISDN phone number. Your
telephone company can tell you whether a SPID is required
and supply you with the correct value.