System Release 6.1 cPCI for Windows Release Guide — May 2006 33
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For further information about these protocols, see the Global Call CDP Configuration
Guide.
Querying ABCD bits
The Direct Signaling protocol now provides the ability to retrieve the current state of
the ABCD signaling bit values by using the gc_Extension( ) function. For further
information, see the Global Call CDP Configuration Guide.
Support for ANI category digit retrieval on DM3 boards
The gc_GetCallInfo( ) function, which retrieves information associated with a call,
can now be used to retrieve the category digit for DM3 boards. (Formerly, the
gc_GetCallInfo( ) CATEGORY_DIGIT parameter was supported for Springware
boards only.) For information about using the gc_GetCallInfo( ) function, see the
Global Call API Library Reference.
The category digit is used to determine the origin or type of the calling party (for
example, ordinary subscriber, pay phone) so that the application may choose to take a
specific action based on the call’s origin. The category digit is used mainly with E1
R2MF protocols, and the categories are determined by the protocol.
New Global Call Features for IP Technology
The Global Call API Library provides many new features that apply to the IP technology,
either in general or specifically to either the SIP or the H.323 protocol. The following list
includes features that are new since System Release 6.0 cPCI Feature Pack 1 for
Windows.
The following new feature applies to the IP technology in general (that is, both H.323 and
SIP protocols):
Support for Early Media when using Global Call
Media streaming is automatically established as early as possible in the call
connection process to allow transfer of signaling tones or system announcements.
Note: When using DM/IP boards, the early media capability must be explicitly
enabled by means of a new parameter (PrmEarlyMedia) in the DM3
configuration file. See the DM3 Configuration Guide for details.
Access to coder information in FastStart call offers
When a “FastStart” call offer that contains one or more coder proposals is received,
the application can optionally access that coder information before accepting the offer.
Previously, the coder information was only used internally by the library to begin the
coder negotiation process.
RTF logging facilities
The logging capabilities available for the IP call control library and the SIP and H.323
protocol stacks now use the same RTF facilities as other system logging operations.
Host network disconnection alarm
GCAMS alarm to notify Global Call applications if the host LAN connection is lost (due
to cable disconnection or network failure, for example) and when the connection is
restored.
