Table of Contents
Advertisement
This information element is used by the PBX to request redirection
information. If the information is restricted, or not available, this
information element indicates what number type was requested (for
example, calling number, connected number, redirecting number).
Optionally, this information element may be passed from user to user
without network interpretation or interaction.
Lower Layer Compatibility
The Lower Layer Compatibility information element allows the originating
user to identify specific requirements requested for lower layer functionality.
More Data
The More Data information element is sent by the user to the network in a
User-to-User Information (UUI) information element; it is delivered by the
network to the destination user(s) in the corresponding UUI message. The
presence of the More Data information element indicates to the destination
user that another UUI message is to follow which contains more information
belonging to the same block of data.
Network-Specific Facilities
The Network-Specific Facilities information element indicates which
network facilities are being invoked at the specified network.
PRI supports the following call types from the PBX to the DMS-250 switch.
(For more information on the call types listed, see Chapter 7, "Feature
interaction.")
VNET—Virtual Network (VNET) calls; VNET calls may be translated
by the network control system, depending on table CALLATTR
information. For more information on the network control system, see
Chapter 5, "Call control."
PRISM—calls to the public network; translated by the in-switch data
tables
PRI supports the following call types from the DMS-250 switch to the PBX:
VNET—calls that imply the call was originally translated by the NCS
800—calls designated as such by the CALLTYPE field in table
LTCALLS under LTID
900—toll calls designated as such by the CALLTYPE field in table
LTCALLS under LTID
PRISM—public calls that are translated in-switch
This information element allows the subscriber to request specific route or
network capabilities. The call is routed on the basis of the service selector in
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Message structure and function 4-5
Advertisement
Table of Contents
