In this section:
The Codec Entry screen enables you to define entries for audio encoding methods and their associated attributes. The parameters available change, depending on which codec you select for audio encoding.
On SBC main screen, go to Configuration > System Provisioning > Category: Call Routing > Codec Entry. The Codec Entry window is displayed.
To edit any of the Codec Entries in the list, click the radio button next to the specific Codec Entry name.
The Edit Selected Codec Entry window is displayed below.
Make the required changes and click Save at the right hand bottom of the panel to save the changes made.
Sonus recommends against editing the default codec entries. Edit only the user-defined codecs.
To create a new Codec Entry, click the New Codec Entry tab on the Codec Entry List panel.
The Create New Codec Entry window is displayed.
The following fields are displayed:
Parameter | Description |
---|---|
Name | The codec entry ID used to identify a particular codec entry. |
Codec | Select the Codec from the drop-down list (refer to Audio Codecs for the codec list):
|
| The maximum Opus bit rate (in bits/second) used for the current session. The value ranges from 6000 to 510000 and the default value is 20000. |
| Use this parameter to specify variable or constant bit rate. Applies to Opus only.
|
| Use this parameter to specify whether or not to use Forward Error Correction (FEC). Applies to Opus only.
|
| Use this parameter to specify whether or not to use Discontinuous Transmission (DTX). Applies to Opus only.
|
Active Codec Set | The active code set is applicable to certain AMR narrow-band codecs. Multiple rates may be selected using comma (,). Valid values are:
|
| Sets the level for Forward-Error-Correction (FEC) Redundancy [AMR only]. The default value of "0" means FEC redundancy is disabled.
|
Dynamic Preferred Rtp Payload Type | Specifies the preferred Dynamic Rtp Payload type. The value ranges from 0 to 127 and the default value is 96. |
Coding Rate | This parameter is used to set the corresponding coding rate for G7221 codec (refer to Audio Codecs for the codec list). The values are:
This parameter is enabled only for G7221 codec. |
Mode Change Neighbor | Enable flag on peer or route PSP to cause SBC to configure DSPs to force mode change to neighboring modes in active codec set as per RFC4867 (applies to AMR and AMRWB).
|
Initial Codec Mode | Use this flag to determine the initial codec mode of an AMR/AMR-WB transcoded call once the call is established.
|
Packet Size | The packet size in milliseconds (ms). Options are based on the type of codec chosen (refer to Audio Codecs for the codec list). Example packet sizes:
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| Specifies the preferred Real Time Protocol (RTP) payload type to be included in the RTP header of the data packet. For audio codecs G726, G723, and G729 the value is a range 0-128. The value for the preferred RTP payload type is fixed at 128 for all other audio encoding methods except iLBC and iLBC with Silence Suppression. For iLBC and iLBC with Silence Suppression, the preferred RTP payload type can be set to any value in the range of 0 to 127 (with no default value). |
Silence Suppression | Enable/disable Silence Suppression mode.
|
Display Level | To display different levels of output information in show commands. |
| Specify the G711 law to use, values are:
Do not use |
Max Interleave Depth | This parameter specifies the amount of interleaving an endpoint can deal with. The value ranges from 0 to 7 and the default value is 0. This field only applies to EVRC and EVRCB calls. The parameter,
|
DTMF | |
Relay | The possible values are:
The default setting is None. |
Remove Digits | Enables the removal of DTMF digits from the media stream. This applies only if DTMF relay is configured as Out-of-Band or RFC 2833. The default setting is Enabled. |
Fax | |
| Specifies the behavior when a fax tone is detected but the treatment fails for any reason. The behavior can be: • Disconnect —Release the call. • Continue —Continue to process the call. The default setting is Continue. |
| Specifies the treatment taken when the fax tone is detected, which can be: For G.711 calls, Notify Peer, Disconnect, Fax Relay, and Fax Relay or Fallback to G.711 require allocation of a compression resource. |
Modem | |
| Specifies the behavior when a modem tone is detected but the treatment fails for any reason. The behavior can be: • Disconnect —Release the call. • Continue —Continue to process the call. The default setting is Continue. |
| Specifies the treatment taken when the modem tone is detected, which can be:
The default setting is None. |
To copy a Codec Entry and optionally make changes to the copy, click the radio button next to the specific Codec Entry to highlight the row.
Click Copy Codec Entry tab on the Codec Entry List panel.
The Copy Selected Codec Entry window is displayed along with the field details which can be edited.
Make the required changes to the required fields and click Save to save the changes. The copied Codec Entry is displayed at the bottom of the original Codec Entry in the Codec Entry List panel.
To delete any Codec Entry, click the radio button next to the specific Codec Entry which you want to delete.
Sonus recommends against deleting the default codec entries.
Click Delete at the end of the highlighted row. A delete confirmation message appears seeking your decision.
Click OK to remove the specific Codec Entry from the list.