System Release 6.1 cPCI for Windows Release Guide — May 2006 37
use this library for application development. VoIP applications that use the Global Call
library for call control will have limited need to use the IP Media Library directly.
Note: IP Media library functionality is documented in the IP Media Library API Library Reference
and the IP Media Library API Programming Guide.
Features
System Release 6.1 cPCI for Windows provides the following new IP Media API Library
features. These features are new since System Release 6.0 cPCI Feature Pack 1 for
Windows.
Support for “Early Media” capabilities on DM/IP boards
An RTP stream can be started in unidirectional mode prior to completing the
connection in order to pass network tones back to the calling party, then changed to
full-duplex mode when the connection is complete. See the “Configuring for Half- or
Full-Duplex Media Streams” chapter in the IP Media Library API Programming Guide
and the ipm_StartMedia( ) and ipm_ModifyMedia( ) function descriptions in the IP
Media Library API Library Reference for more information.
Partial Support for SIP REINVITE on DM/IP boards
To support SIP REINVITE functionality, the ability to change the media stream
direction and remote IP address and port information is provided via the
ipm_ModifyMedia( ) function. See the IP Media Library API Library Reference for
more information.
Media LAN disconnection alarm
A software alarm that notifies an IPML application when a board's media LAN
connection on IPT boards is lost (due to cable disconnection, for example) and when it
is restored. This feature is implemented as a board-level QoS alarm. In the
IPM_QOS_ALARM_DATA structure, a new eQoSType value of
QOSTYPE_NETWORKFAILURE and associated eAlarmState of
ALARM_STATE_ON (indicating network connection loss) or ALARM_STATE_OFF
(indicating network connection restoration) are provided for this feature. See the
“Network Alarm Failure” section in the IP Media Library API Programming Guide and
the IPM_QOS_ALARM_DATA structure description in the IP Media Library API
Library Reference for details.
Support for GMS-AMR coder
IPT boards support the GSM AMR-NB (adaptive multi-rate narrow band) coder for
applications that use the IP Media Library. Eight different AMR-NB allowable rates
from 4.75 kbps and 12.2 kbps are supported. See the “Supported Coder Properties
for Intel NetStructure IPT Series Boards” table in the IP Media Library API Library
Reference for details.
6.6 Modular Station Interface API Library
The Modular Station Interface (MSI) API is used by the Intel NetStructure
®
High Density
Station Interface (HDSI) boards, which provide high density analog station connectivity.
