Specifications

49Digital Family Features
Hunt groups
Groups of extensions, such as those within a company
department, can be assigned a single Directory Number
(DN). Calls placed or routed to that DN ring at all
extensions within the group, in sequence, according to
a pre-defined algorithm.
Hybrid key/PBX configuration
The DIGITAL systems can function as either key,
PBX, or hybrid key/PBX systems, to suit any customer
application requirements.
Incoming call routing
Incoming calls can be routed, per trunk or trunk group,
to specific extensions or groups of extensions. Up to
16 extensions may be programmed to ring for an
incoming call.
Intercom restriction
Four hierarchical intercom groups can be defined in
which extensions belonging to a specific group can
dial other extensions in the same, or in a lower intercom
group, but are restricted from dialing extensions
belonging to intercom groups higher in the hierarchy.
Internal page zones
Up to eight internal page zones may be defined in the
DIGITAL KEY BX and DIGITAL 400 systems, and
up to 16 internal page zones may be defined in the
DIGITAL 1000 system. Each extension may be granted
or denied access to each page zone. Announcements
to internal page zones may be routed simultaneously
to a public address system.
ISDN (Integrated Services Digital Network)
ISDN Primary Rate Interface to outside lines following
ETSI (Euro-ISDN), NT-DMS100, and AT&T-4ESS
and 5ESS standards is supported. Each ISDN Primary
Rate Interface PRI24 card provides a 23B+D channel
interface to the ISDN-based public switch network and
the ability to access ISDN supplementary services
(where supported by the public network).
Each ISDN Primary Rate Interface PRI30 card provides
a 30B+D channel interface to the ISDN-based public
switch network and the ability to access ISDN
supplementary services (where supported by the public
network). These services include Calling Line
Identification Presentation, Calling Line Identification
Restriction, Direct Inward Dialing, and Call-By-Call
Integrated Service Access (see ISDN Features, below).
The DIGITAL system can generate busy, ring, and
dial tones for ISDN PRI lines when these tones are not
supplied by the CO. ISDN Basic Rate Interface to
outside lines following ETSI, NI1-DMS100, or NI1-
5ESS standards is supported. The BRT card provides
four 2B+D channels for Basic Rate Interface to the
ISDN-based public switch network and the ability to
access ISDN supplementary services (where supported
by the public network).
Basic Rate Interface is also provided for ISDN stations
and terminals where ETSI (Euro) or AT&T ISDN
protocol is supported. Each Basic Rate Interface
station/terminal card provides four 2B+D channels.
Least Cost Routing (LCR)
For each hour of the day and each day of the week,
the system can select the least expensive available
route and carrier for a given call, to maximize cost
savings on long distance calls. Every installation can
implement LCR in a unique way to meet its specific
needs.
Letter code feature access
The feature access codes programmed in the system
reflect the feature name. For example, Background
Music is operated by dialing [FEATURE] [B] [M] or
[7] [2] [6] on the dialpad. You can access features
without committing the feature code to memory, simply