System information

Dialogic
®
HMP Software Release 3.0WIN Release Guide — December 2010 39
Dialogic Corporation
Features
• Echo Cancellation
Includes the following echo cancellation support for circuit switched connections that
may contain echo on the received media stream:
– Provides echo cancellation via runtime API command for the:
• Dialogic
®
HMP Software signal detector of the Dialogic
®
HMP Voice resource
• Dialogic
®
HMP Software conferencing resource
• Dialogic
®
HMP Software CSP resource
• Dialogic
®
HMP Software IPM resource (for E1/T1 connections)
– Compliance with G.168
– Support for echo cancellation on tail lengths up to 64 msec
Note: The signal detector only supports tail lengths of 8 msec.
See the appropriate API library documentation for more information about echo
cancellation support in that API library. See the Dialogic
®
Host Media Processing
Software Configuration Guide for information about implementing echo cancellation.
• SIP Re-INVITE
Support for subsequent INVITE requests, also known as re-INVITE requests, on
existing SIP dialogs (calls). A Global Call application using the SIP protocol can
originate a re-INVITE request to a remote endpoint, receive a re-INVITE request from
the remote endpoint, and accept or reject that received re-INVITE.
The support of re-INVITE is implemented by means of SIP-specific APIs in the Global
Call library. These APIs are documented in detail in the Dialogic
®
Global Call IP
Technology Guide.
• Early Media Call Setup
When using IP technology, the ability to configure an end point for half-duplex (or full-
duplex) media streaming and subsequently reconfigure the end point for full-duplex
(or half-duplex) media streaming is supported. See the Dialogic
®
IP Media Library API
Programming Guide and the Dialogic
®
Global Call IP Technology Guide for additional
information.
• Supported Codecs for IP (RTP) Encoding/Decoding:
– G.711 (64 kbps format) mu-law and A-law (10, 20, and 30 ms frames)
Note: Frames of 10 ms are not supported on configurations that exceed 240
channels.
– G.723.1 (5.3 and 6.3 kbps format) 30 ms frames (1, 2, or 3 frames per packet)
– G.729A (compatible with G.729 format) and G.729AB (compatible with G.729B
format) (8 kbps format) 10 ms frames (2, 3, or 4 frames per packet)
– G.726 IP Coder
• IP Call Control:
– Support for H.323 and SIP protocols via Global Call
– SIP call transfer
– H.450.2 call transfer (H.323)
– SIP outbound proxy
– SIP over TCP
– SIP request retry
– MIME-encoded SIP message bodies