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Chapter 2. Installation
14 Express XRT User Guide 61202.153L3-1
Automatic Redial
Automatic redial dials the last number dialed. This can be accom-
plished using a touch-tone phone as follows:
Redial last number: Press ** 5
When connecting to a National ISDN 1 switch, call conferencing, mes-
sage waiting, and call transferring are assigned a unique feature identi-
fier number. This number may not be the same in all areas. S-registers
90 and 91 contain the feature identifier numbers for conference and
transfer. If these features do not work, contact your ISDN provider.
Phone Number Allocation
The Express XRT allocates ISDN phone number 1 to POTS port 1.
Connect the primary telephone to POTS port 1 as shown in
Figure 2-2 on page 7.
ISDN phone number 2 is shared by the RS-232 port and POTS port
2; therefore, only one can be used at a time.
ISDN data calls and external modem applications must be placed to
ISDN phone number 2.
Single Phone Number Operation
For AT&T 5ESS point-to-point lines and other lines with a single
phone number, incoming voice calls are routed to POTS port 2 to
allow for use of either a modem or a telephone. Service on POTS
port 1 is not available.