Nortel DMS-250 - Congestion Level; Connected Number; Facility

4-4 Message structure and function
297-2521-106 Standard 23.01 March 2001
interface requested is the interface that contains the D-channel. If the
interface that contains the D-channel does not contain B-channels, a release
with cause is returned specifying channel not available.
The DMS-250 switch will always identify the DS-1 interface explicitly
when table PRIPROF has the function switch “XPLCTIID” datafilled,
regardless of the number of DS-1 interfaces that comprise the PRI.
Congestion Level
The Congestion Level information element indicates whether the
terminating user or the network is able to receive the USER INFO message.
Connected Number
The Connected Number information element indicates which number is
connected to a call. The Connected Number may be different from the
Calling Party Number or Called Party Number because of changes (call
redirection) during the lifetime of the call. As a subscription option, the
connected number may be passed from user to user without network
interpretation or interaction. The element is sent by the PBX only in
response to an information request information element.
Display
The Display information element supplies display information visible to the
user. Optionally, this information element may be passed from user to user
without network interpretation or interaction.
Facility
The Facility information element indicates the invocation and operation of
supplementary services identified by the corresponding operation value
within the Facility information element. The maximum length of this
element depends on the service provided.
Generic Digits
The Generic Digits information element accepts and/or delivers the Network
Call Identifier (NCID) received from the originating switch, an intermediate
or terminating switch, or the reoriginating switch.
Higher Layer Compatibility
The Higher Layer Compatibility information element allows the originating
user to identify specific requirements requested for upper layer functionality.
Information Request
The Information Request information element allows the system to request
additional information and signal completion of the information requested.