Dialogic IMG - Physical Node - Multinode

Table of Contents

To create a Physical Node object, right click on the Dialogic object and select New IMG 2020. The Physical node object gives the user the ability to select an ID, enter a Name that identifies the node, select a Media Mode, and Enable or Disable SRTP. Once these variables have been configured, and the object has been committed, the Web GUI examines the IMG 2020 node and auto populates all the other fields.

Web GUI Page

IMG 2020 > New Physical IMG 2020

Open

Maximum Objects

A maximum of six IMG 2020 nodes can be created and configured under the Web GUI.

Related Topics and Dependencies

The Physical Node object is populated by examining the node being configured and displaying the attributes of that specific node in the separate fields as displayed above. The node being examined has the IP address that is entered into the web browser when opening up the Web GUI.

 Basic Configurations

Web GUI Overview

Field Descriptions

ID

The ID field configures an ID onto the node being created. Either accept the default or select an ID to be created on the IMG 2020 from the drop down menu within this field. The ID's of the drop down menu range from 0-9. Once the Node ID has been configured, it cannot be reused or modified without deleting and re-adding the node.

IMG 2020 Name

Click in the Name: field and enter a name that identifies the node being created. A maximum of twelve characters is allowed. Valid characters are alphanumeric (a-z, A-Z, 0-9) and these characters:   - ! % * _ ` ' ( )[ ]{ } < >

Media Mode

The Media Mode field is where the System Media Mode is configured. Within this field, the user decides the percentage of channels that will perform the codec or frame-size (aspect ratio) transcoding operation as opposed to how many channels will allow video to pass thru the IMG 2020 with no codec or frame-size transcoding. The System Media Mode is dependent on the number of DSP Processors installed and configured. Refer to the information below.

Audio LBR

Audio LBR (Low Bite Rate) refers to the codecs included in RTP LBR Audio Transcoding on the IMG 2020. This mode is configured when the IMG 2020 is used to process both signaling and RTP for audio calls, as well as process the enhanced services such as processing DTMF digits, tones, and announcements.

The next two tables below display the max channel densities that can be expected when Audio LBR is selected. The first table displays the channel densities when the Audio SRTP Support field in this object is set to Disabled. The second table displays the max channel densities that can be expected when the Audio SRTP Support field in this object is set to Enabled.

Audio LBR - AUDIO SRTP Support field = Disabled

Notes on LBR

In Audio LBR, the number of RTP Audio Transcoding channels is equal to the number of IP facilities. In each scenario, DSP Enhanced services such as DTMF Digits, Tones, and Announcements utilize 2 DSP resources.

Audio LBR - AUDIO SRTP Support field = Enabled

Audio 3G

Audio 3G adds AMR-NB to the specifications described in the Audio LBR section above. Audio 3G supports more Codecs but the channel density is decreased. The next two tables below display the max channel densities that can be expected when Audio 3G is selected. The first table displays the channel densities when the Audio SRTP Support field in this object is set to Disabled. The second table displays the max channel densities that can be expected when the Audio SRTP Support field in this object is set to Enabled.

Audio 3G - AUDIO SRTP Support field = Disabled

Audio 3G - AUDIO SRTP Support field = Enabled

Audio HD

The Audio HD selection gives the IMG 2020 the ability to pass High Definition quality audio by utilizing the TFO (Tandem Free Operation) protocol and AMR-WB codec. The Audio HD adds AMR-WB codec to the 3G Media Mode described above. The combination of these give the IMG 2020 High Definition Audio over a mobile wireless 3GPP network.

Audio Dynamic Density Management

The Audio Dynamic Density Management selection utilizes a per channel points system. Points for a channel are dependent on the audio codec being used. Resource points are taken from and returned to a large pool of resources points. The audio dynamic density management selection aims at utilizing the largest number of IP media channels based on the unique blend of codecs and SRTP usage. When the Audio Dynamic Density Manager is selected, there are not an absolute number of channels available since different codecs use different amounts of resource points. A Dynamic Density Management Spreadsheet/Calculator is provided to assist customers in calculating the potential channel count available dependent on the Codec/SRTP usage. Contact your nearest Sangoma Sales and Support Team Personnel at https://www.sangoma.com/company/contact-sangoma/ and they can assist with any questions related to utilizing the Dynamic Density Management Spreadsheet/Calculator. The table below displays the maximum values available when Audio Dynamic Density Management is selected.

 Note: The number of IP Bearer ports assigned will support up to 252 ports per DSP device but may not be achieved due to codec/SRTP usage.

Multimedia [Video: 0 % TransCode] - (100% Passthru)

Multimedia supports all the audio capabilities that the Audio 3G Selection provides. In addition, Multimedia also supports video Pass-Through.

 Multimedia [Video: 25% TransCode]

This is the first mode that brings in multimedia. This mode is geared toward bridging the 3G-H.324M network with Packet Multimedia.  With this mode, Facility Media Resources are created so that of the total multimedia capable facilities, around 25% of the can be actively transcoding video. The other 75% can continue to support audio or pass through the video without any transcoding.