Filter
Top Products
Network Management Features
Issue 5 January 1998
12-5555-230-024
Subnetwork trunking provides digit insertion, deletion, pauses, and/or wait for
dial tone in digit outpulsing, as required, to permit calls to route to or through a
remote switch, over tie trunks to a private network switch, or over central office
trunks to the serving central office.
Generalized Route Selection
Generalized Route Selection gives you the capability to not only select the opti-
mal call routing based on the dialed number, but also select the appropriate facil-
ity based on the type of call. Generalized Route Selection enhances Automatic
Route Selection and Automatic Alternate Routing by incorporating additional
parameters such as the type of call to be used in the decision of how a call is
routed.
Different types of calls require the use of different types of facilities. For example,
high-speed data calls must use digital facilities, whereas voice and voice-grade
data calls can use either analog or digital facilities. DEFINITY ECS uses General-
ized Route Selection to differentiate between these and other types of calls and
route them on the appropriate trunks. Based on the call types and available trunk
facilities, voice and data calls may be routed over different trunk types or inte-
grated on the same trunk group. DEFINITY ECS also provides the capability to
route calls based on the data format and the need for restricted or unrestricted
facilities.
In order to select the appropriate trunking facility for a call, DEFINITY ECS must
know the type of call being made. In order to do this, each originating facility
such as a telephone or data module has a bearer-capability class assigned.
Some originating facilities, such as data modules, may have multiple bearer-
capability classes. Each trunk group in the routing pattern is assigned a list of
allowed bearer-capability classes. When a user makes a call, the system queries
the originating facility for its bearer-capability class and then tries to route the call
on a trunk group with a bearer-capability class that matches the bearer-capability
class of the originating facility. If an exact match is not found, the system then
tries to find a trunk group with a compatible bearer-capability class.
Since the system automatically chooses the right trunk based on the system
administration, the DEFINITY ECS system dial plan can be independent of the
type of call being dialed. This makes life easier for your system users, who do not
have to worry about dialing a different access number for different call types.
Facility Restriction Level
Facility Restriction Levels are used to limit user calling privileges for incoming
and outgoing calls. The Facility Restriction Level determines if a call attempt is
permitted and which routes can be used or denied in the routing process. Eight
levels of Facility Restriction Levels can be assigned to telephones, computers,