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Page 99
System Hardware
Inter-Tel
®
Axxess
®
Administrator Guide — Issue 11.0, May 2008
Off-Premises Extensions (OPX)
Off-Premises Extensions (OPX)
Off-premises extensions are remote single-line DTMF sets that are connected to the Inter-Tel
system through telephone company OPX circuits (or customer-provided circuits).
Off-premises station users gain access to the features by performing a hookflash/recall (press-
ing and releasing the hookswitch quickly) and entering feature codes.
Some telephone company off-premises extension (OPX) networks do not recognize certain sin-
gle-line set ring cadences used in the system. This incompatibility results in an inability to pro-
vide certain ring signals to off-premises extensions. Because of this, the system is equipped
with a station option (Extended Ring Cadences) which allows the ring cadences be altered for
individual single-line circuits.
DIGITAL DIRECT STATION SELECTION/BUSY LAMP FIELD (DSS/BLF) UNITS
The Inter-Tel system supports three types of DSS/BLF Consoles/Units.
•
With Models 8560 and Model 8520 Endpoints:
Model 8560 and 8520 endpoints
equipped with a PCDPM support up to four 50-button DSS/BLF Units. There can be a
total of 20 of these 50-button DSS/BLF Units on the system. The presence of the
optional Mini-DSS does not affect the number of units supported.
•
With Executive Display, Standard Display, Professional Display, and Associate Dis-
play Endpoints:
Executive, Professional, Standard, and Associate Display endpoints
equipped with a PCDPM support up to four 60-button DSS/ BLF Units. There can be a
total of 20 of these 60-button DSS/BLF Units on the system.
NOTE:
Because each 50- and 60-button DSS Unit is powered by an AC transformer
and is connected to the endpoint’s PCDPM, the Units do not require a DKSC or DKSC-
16/DKSC-16+ circuit that is separate from the endpoint.
•
With Executone IDS Endpoints:
IDS endpoints can be equipped with up to three 48-
button DSS Units. The IDS endpoint does not require a PCDPM. There can be a total of
80 IDS 48-button DSS Units on the system. Each 48-button DSS Unit requires an
EKSC circuit.
Although the 50-button Unit is designed for Models 8560 and 8520 endpoints, and the 60-but-
ton Unit is designed for Executive, Professional, Standard, and Associate Display endpoints,
you can use either DSS/BLF Unit on any of these endpoints. Each single unit provides one-
button access to 50 or 60 extension numbers and/or other features/ resources. For instructions
on programming and using DSS/BLF buttons, see
OFF-PREMISES EXTENSIONS
Axxess
DKSC
OPX
Axxess or
other system
SLA
B1
B2
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