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FaxPress Enterprise Redundant T1 Line Types and Signaling
High-volume digital lines in US domestic areas are typically either T1 CAS/RBS (Channel Associated
Signaling/Robbed Bit Signaling) or T1 PRI (Primary Rate Interface), also called T1 ISDN PRI. The T1 CAS/
RBS configuration provides 24 fax channels; the T1 PRI/T1 ISDN PRI configuration provides 23 fax bearer
(B) channels and one data signaling (D) channel.
FaxPress Enterprise and T1 CAS/RBS Signaling
The FaxPress Enterprise Redundant T1's Dialogic board settings are pre-configured to support T1 CAS/RBS,
with Line Coding B8ZS, and Framing ESF. For T1 CAS/RBS, with Line Coding B8ZS, and Framing ESF,
the only fax board setting that may require modifying is the range of line extensions setting. See
T1 Line Carrier Information
for details.
on page 20
FaxPress Enterprise Redundant and T1 PRI
The FaxPress Enterprise Redundant T1's default fax board configuration (specifically, the Switch Type) must
be modified to support T1 PRI (also called T1 ISDN PRI). To support T1 PRI/T1 ISDN PRI, you'll need to
modify the Dialogic fax board's default settings. See
Configuring the FaxPress Enterprise Redundant for T1 PRI/T1 ISDN PRI on page 21 f
FaxPress Enterprise Redundant and Fractional T1 Lines
The FaxPress Enterprise Redundant Fractional T1 unit will use the first 8 channels of the 24 channels on a
T1 line. Confirm with your T1 carrier that the T1 line they're providing you has the first 8 channels activated
rather than the last 8 channels or the middle 8 channels. See either
Redundant for T1 CAS/RBS on page 20
T1 ISDN PRI on page 21
Required T1 Line Carrier Information
T1 line and switch types, signaling protocols, coding and framing can vary. The phone company must provide
the information required for configuring the FaxPress Enterprise Redundant. The phone company/line carrier
will need to tell you:
•
Whether the Signaling Protocol is T1 CAS/Robbed Bit Signaling or T1 ISDN (4ESS or 5ESS or DMS
or NI2).
•
Whether the Line Coding is B8ZS or AMI.
Whether the Framing is ESF (D4 framing is not supported with the Diva card)
•
•
The DNIS string configuration, including number of DNIS digits, total length of the string including
ANI digits (if any), and other characters. Configuring the FaxPress Enterprise Redundant mailbox IDs
for automatic routing requires knowing the number of digits being passed. FaxPress Enterprise
Redundant also has a dtmf.log file diagnostic tool that can determine precise digit string information.
•
The DNIS digit/line extension range (e.g. 272-0001 to 272-1000).
below and
Configuring the FaxPress Enterprise Redundant for T1 CAS/RBS
or
Configuring the FaxPress Enterprise Redundant for T1 PRI/
for configuration details.
FaxPress Enterprise Redundant T1 Line Types and Signaling
Required T1 Line Carrier Information
Configuring the FaxPress Enterprise
Required
below and
or details.
19
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