Media - Packet Service Profile

Name

The packet service profile entry ID used to identify a particular packet service profile entry.

Silence Factor

The silence factor is the percentage of call time for which silence is expected. It is used to reduce expected call bandwidth.

The default value is 40.

Type of Service

Specifies the type of service (TOS) parameter to be provided in the IP header for voice packets. It is the decimal number that is included as is in the 8-bit TOS field of the IP header. Note that this number should be four times the DSCP value that you want to set in the high order 6 bits of the 8-bit TOS field.

The default value is 0.

Voice Initial Playout Buffer Delay

Specifies a numeric value, in milliseconds (ms), for the voice initial playout buffer delay required to absorb the maximum expected packet jitter across the network, in the range of 1 ms to 50 ms in increments of 1 ms.

The default value is 10 ms.

Peer Absence Action

Specifies the action to be taken when loss of bearer plane connectivity is detected on the channel. Possible actions are:

• None—No action taken.
• Trap—Generate an SNMP trap.
• Trap and Disconnect—Generate an SNMP trap and disconnect the call.

Requires the RTCP check box to be selected, which enables RTCP on the channel. The default setting is None.

AaL1 Payload Size

Specifies the ATM Adaption Layer Type 1 (AAL-1) payload size. For G.711, the possible values are 40, 44, or 47 bytes.
The default value is 47 bytes.

Preferred RTP Payload Type for DTMF Relay

Media Packet COS

Applies a Class of Service (COS) marking to be set in the User Priority field of the Ethernet VLAN tag header on media packets transmitted on a call leg that uses this packet service profile. Has an effect only if the network interface supports 802.1Q tagged Ethernet frames. The default value zero corresponds to best effort. The value range is 0-7.

Honor Remote Precedence

Specifies whether the audio encoding priority order of the local packet service profile takes precedence over the remote peer's audio encoding priority order when creating the priority order of the audio encodings that are common to both.

Possible choices are:

• Disabled (default) — the local audio encoding priority order take precedence. Disabled also makes the local secure RTP/RTCP settings and crypto suite priority order take precedence.
• Enabled — the remote peer's audio encoding priority order take precedence. For ingress call legs, Enabled also makes the remote peer's secure RTP/RTCP settings and crypto suite priority order take precedence.

Send Route PSPPrecedence

Specifies the audio encoding order preference in outgoing messages only. The options are:

• Disabled (default) —disable the audio encoding order preference.
• Enabled — enable the audio encoding order preference.

The RTP Payload Type included in the RTP header of the data packet. The value ranges from 0 to 127 and the default value is 56.

Specifies the maximum data packet size (Kilobits). The options are:

• 10
• 20
• 30
  
• 40

Specifies whether to enable RTCP. The options are:

• Disable (default)
• Enable – RTCP is used for the call.

By default, this option is enabled to allow SID packets to be sent within a minimal interval during a silence period (at least one SID packet must be sent within a SID maximum packet time frame). The options are:

• Disable
• Enable (default)

This attribute specifies the codec entry with a priority of "1". For each codec entry, select the desired codec. Codec IDs available by default are:

• G711-DEFAULT
• G711SS-DEFAULT
• G723-DEFAULT
• G723A-DEFAULT
• G726-DEFAULT
• G729A-DEFAULT
• G729AB-DEFAULT

 Apply fax tone treatment. The options are:

• Disable (default)
• Enable

Enable this flag to perform transcoding when the ingress and egress call legs use different DTMF relay methods. The options are:

• Disable (default)
• Enable

 Enable this flag to perform transcoding when the ingress and egress call legs use different packet sizes. The options are:

• Disable (default)
• Enable

Enable this flag to perform transcoding when the ingress and egress call legs use different silence suppression methods. The options are:

• Disable (default)
• Enable

Enable Honor Offer Preference (HOP) to honor the codec preference of the peer's offer when Honor Remote Preference on the PSX is enabled.  This option is available only when Transcode is Conditional. (See the table below describing SBC behavior when this option is enabled/disabled). The options are:

• Disable (default)
• Enable

The SBC triggers a new offer towards the other side when an answer is received for a re-INVITE from this side. The re-INVITE generated on the other side carries all possible codecs in Route Packet Service Profile that causes the most preferred codec of the other side peer to be modified. Enable Honor Answer Preference (HAP) to lock down the most preferred codec towards the peer irrespective of re-INVITE received for mid-call modification from this side. (See the table below describing SBC behavior when this option is enabled/disabled). The options are:

• Disable (default)
• Enable

Enable this option to disallow data calls. The options are:

• Disable (default)
• Enable

Specifies whether digit detection is enabled on digits sent to the network. The options are:

• Disable (default)
• Enable

INFO: See Digit Detect Send Enabled Settings for KPML table below to understand which PSP leg to enable this flag for the desired KPML functionality.

Enable this option to use direct media as needed. The options are:

• Disable (default)
• Enable

When enabled on both the Ingress and Egress call leg, the DSCP value in the IP header of the media packets is transparently passed through the system. Once media is received from the peer, any value set in the Type Of Service field on the Packet Service Profile has no effect when Dscp Passthrough is configured on both legs for the associated call. The options are:

• Disable (default)
• Enable

Enable flag to generate a new SSRC (using a random value) along with a new timestamp on a new RTP stream whenever a resource is reactivated (due to change in codec, etc.). SSRC randomization reduces the probability of collision in large groups and simplifies the process of group sampling that depends on uniform distribution of SSRCs. The options are:

• Disable (default)
• Enable
  

Enable flag to set HD codecs as preferred codec over non-HD codecs even if transcoding is required. When flag is disabled, continue with existing PSP/IPSP behavior. The options are:

• Disable (default)
• Enable

When enabled,

Note:

• If Force Route PSPOrder is enabled, this option does not affect the ordering of outgoing offer.
• If Transcoder Free Transparency is enabled, this option is ignored.

Enable this option to allow the SBC to choose NB-NB pass-through over HD-HD transcoded call. The options are:

• Disable (default)
• Enable

When disabled, the SBC prefers HD-HD transcoded call over NB-NB pass-thru.

Note:

• This option is valid only if HDCodec Preferred is enabled, and it is applied when selecting a codec from answer.
• If Transcoder Free Transparency is enabled, this option is ignored.

Enable this option to allow the SBC to send only NB in the outgoing offer if only NB is received in the ingress offer. Otherwise, do nothing. While sending the offer, this option is ignored if either HD-only or (HD+NB) is received in incoming offer. The options are:

• Disable (default)
• Enable

If  this option is disabled, the SBC uses existing behavior.

Note: If Transcoder Free Transparency is enabled, this option is ignored.

Enable this option to send the outgoing offer in the same order as in the egress route Packet Service Profile, irrespective of HD/NB priorities. The options are:

• Disable (default)
• Enable

Note:

• If this flag is enabled, the HDCodec Preferred option does not affect the ordering of outgoing offer.
• If Transcoder Free Transparency is enabled, this option is ignored.

Enable this flag to generate an SSRC value and associated attributes and include them in SDP signaling and RTP/RTCP streams. Options are:

• Disable (default)
• Enable

Note: This flag takes precedence over the Packet Service Profile Ssrc Randomize flag.

Enable this flag so that in call hold/resume scenarios the SBC modifies the SSRC and associated attributes after the call resumes. The SBC sends both the previous and updated SSRC in SDP signaling and includes the new SSRC in RTP/RTCP streams. Options are:

• Disable (default)
• Enable

Note: You must enable the Generate and Signal SSRCAnd Cname flag before you can enable this flag.

Note: If you enable the IP Signaling profile common IP attributes flag Minimize Relaying Of Media Changes From Other Call Leg All, you must also enable the Relay Data Path Mode Change From Other Call Leg flag to have the SSRC modification processing take effect.

Reserves bandwidth on the basis of the preferred common codec, and polices on the worst case codec. This applies to both known and unknown codecs. The options are:

• Disable (default)
• Enable
  

Note: This option is active for a call when both PSPs have this option enabled. If this option is disabled in either of the PSPs, the option is not applied.

When enabled, the SBC reserves bandwidth based on the worst-case common codec on trunk groups and interfaces, but polices on the maximum bandwidth for all codecs from the Offer or Answer in a pass-through call. The options are:

• Disable (default)
• Enable
  

Note: This configuration applies to all pass-through calls. It works independently from Audio Transparency feature and Reserve BW For Preferred Audio Common Codec flag.

Specifies whether text media calls, using T.140 codec, are allowed. The options are:

• Disable (default)
• Enable

For more information on text codecs, refer to Text Codecs.

• Disable (default)
• Enable

Enable this option to determine how the SBC handles SSRCs in SRTP media flows. When enabled, the SBC:

• generates and replaces the SSRC for both pass-through and transcoded SRTP media flows
• generates a new SSRC value when a mid-call modification occurs (such as hold/resume)
• replaces the CNAME in the SRTCP SDES block
• replaces the SSRC in the SRTCP report blocks

 When disabled, the SBC relays the SSRC for pass-through media flows it receives from the peer. The options are:

• Disable (default)
• Enable

The following data rate management types are supported:

• Type1 Local Generation Of Tcf – Type 1 data rate management requires that the Training Check Frame (TCF) training signal is generated locally by the receiving gateway. Data rate management is performed by the emitting gateway based on training results from both PSTN connections. Type 1 is used for TCP implementations and is optionally used with UDP implementations.
• Type2 Transfer Of Tcf – (default) Type 2 data rate management requires that the TCF is transferred from the sending gateway to the receiving gateway rather than having the receiving gateway generate it locally. Speed selection is done by the gateways in the same way as they would on a regular PSTN connection. Data rate management type 2 requires the use of UDP and is not recommended for use with TCP.

Use this object to select the T.38 maximum bit rate which controls and manipulates bits 11, 12, 13, and 14 in the DIS command received by the SBC from either the TDM circuit interface or the T.38 packet interface:

• 2.4Kbits_s – For modem type ITU-T V.27ter fall-back mode.
• 4.8Kbits_s – For modem type ITU-T V.27ter.
• 9.6Kbits_s – For modem types ITU-T V.27ter and V.29.
• 14.4Kbits_s – (default) For modem types ITU-T V.27ter, V.29, and V.17. This setting is used to constrain the type of modem modulation schemes.

Use this flag to allocate DSP resources, when available, for T.38 Error Correction Mode (ECM) calls.

• Disable – (default) use normal resource allocation.
• Enable

Enable this option to allow fallback to standard RTP/RTCP when crypto attribute negotiation fails. The options are:

• Disable (default)
• Enable

Enable this option to enable secure RTP/RTCP. The options are:

• Disable (default)
• Enable

Enable this option to reset the SRTP Roll Over Counter when the session key changes. The options are:

• Disable (default)
• Enable

Enable this option to reset the Roll Over Counter for both encryption and decryption when decryption key changes. The options are:

• Disable (default)
• Enable

For an SRTP call, if this option is enabled in the Packet Service Profile and the call leg mode is changed from sendonly/inactive/recvonly to sendrecv, the SBC generates a new set of crypto attributes. The options are:

• Disable (default)
• Enable

The maximum allowable session bandwidth (in Kbps) for a call that includes video streams. This value includes the bandwidth for all streams in the call (audio, video, BFCP, and so on). If "0" is set as the value, video calls are not allowed; and only audio calls can be set up following the normal allocation process (range: 0-50000 Kbps / default = 10).

The amount, as a percentage, to reduce the session bandwidth allocation for calls that include video streams. This setting only affects the internal allocation of bandwidth used for the calls (does not affect the signaling). For example, if the reduction factor is "20", the bandwidth allocated for calls is reduced by 20%. In other words, if the normal bandwidth allocation for calls is 1000 Kbps, a 20% reduction equates to a new 800 Kbps bandwidth. (range: 0-100 / default = 0).

By default, this option is enabled to allow a call to continue with the audio portion only if the video cannot be established for any reason. The options are:

• Disable
  
• Enable (default)


When enabled, specifies a fall back to standard RTP when crypto attribute negotiation fails. The options are:

• Disable (default)
• Enable

When enabled, this parameter enables secure RTP. The options are:

• Disable (default)
• Enable

When enabled, relay of DTLS-SRTP audio and video streams is enabled on the SBC. The options are:

• Disable (default)
• Enable

When enabled, relay of DTLS/SCTP streams is enabled on the SBC. The options are:

• Disable (default)
• Enable