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Getting Started
16
T-1 Line Type and Configuration Parameters
T-1 lines in US domestic areas are almost without exception one of two
types: T-1 CAS E&M and T-1 ISDN (PRI-ISDN). The T-1 CAS E&M
has 24 fax channels; the T-1 ISDN has 23 fax channels.
T-1 line types, protocols, coding and framing can vary. Before continuing
with the FaxPress Premier Digital setup, please determine:
• whether the Signaling Protocol is T-1 CAS E&M or T-1 ISDN
(4ESS or 5ESS or DMS or NI2.)
• whether the Line Coding is B8ZS or AMI
• whether the Framing is ESF or D4 (most T-1 ISDN requires ESF)
• what the T-1 line’s DNIS string configuration is – that is, how many
digits the T-1 line passes to the Premier, and where in this
• what the fax number range (i.e. 555-0001 to 555-1000) will be.
See the next section,
Configuring the Premier’s Board Settings for
your T-1 on page 16 of this guide
to determine if you need to modify
the Premier’s default settings.
Configuring the Premier’s Board Settings for
your T-1
The FaxPress Premier Digital’s default setting is T-1 with Signaling
Protocol CAS E&M, Line Coding B8ZS, and Framing ESF. If your T-1
line configuration matches the Premier’s default configuration, you
won’t need to change the Premier’s digital board configuration
If your T-1 line configuration is different from the Premier’s default
configuration, however – that is, if your T-1 Signaling Protocol is ISDN
rather than CAS E&M, or if your Line Coding is AMI rather than B8ZS,
for example – you’ll need to modify the FaxPress Premier’s digital board
configuration.
Note: Implement the following changes very carefully. Incorrect
parameter value changes may compromise fax board function.