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Chapter 2. Setting Up the Express 3000
61203153L2-20 Express 3000 User Manual 2-11
Figure 2-5. POTS Interfaces
Connecting Your Primary Telephone
The Basic Rate ISDN line, required for using the Express 3000, in-
cludes two ISDN phone numbers (see also,
Ordering a Basic Rate ISDN
Line
on page 1-4). The Express 3000 allocates ISDN phone number 1 to
POTS port 1. Connect your primary telephone (the one you use to talk
to people) to POTS port 1 (see Figure 2-5).
Shared Port for Analog Devices
ISDN phone number 2 is shared by the EIA-232 port and the POTS
port 2; therefore, you cannot use both ports at the same time. For ex-
ample, you can’t use a FAX machine connected to POTS port 2 at the
same time you are using the Express 3000 for, say, Internet access.
ISDN data calls and external modem applications must be
placed to ISDN phone number 2, so provide this number as
your FAX number, etc.