> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/rtp-media.md). # RTP and media parameters RTP/RTCP, jitter buffers, DTMF and echo control. 28 parameters. ## A | Parameter | Description | | ------------------------------- | ------------------------------------------------------------------------- | | **Allow low-delay media relay** | This parameter allows low-delay media relay mode between two joined legs. | ## B | Parameter | Description | | ------------------------------------------------------- | ---------------------------------------------------------------------------------------- | | **Busy Tone Options: Default Duration** | Duration (in milliseconds) for DTMF tones played on calls using this profile. | | **Busy Tone Options: Default Interval (between tones)** | Delay between tones (in milliseconds) for DTMF tones played on calls using this profile. | ## E | Parameter | Description | | ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | | **Early Media Relay and Ring Tone Generation: Delay before connecting early media** | \* Delay before connecting early Insert a delay, upon reception of alerting indication, before joining audio from outgoing call to incoming call. | | **Early Media Relay and Ring Tone Generation: Incoming Calls Early Media Mode** | \* Forward from outgoing to incoming call: Forward early media indication from outgoing call to corresponding incoming call, if present. | | **Early Media Relay and Ring Tone Generation: Outgoing Calls Early Media Mode** | \* Automatic early media detection:Rely on indications in outgoing call's signaling to determine if early media is present or not. | | **Early Media Relay and Ring Tone Generation: Ring Tone Starting State** | Call state when the ring tone is started (if required) on the incoming call leg. | | **Echo Cancellation: Enable Coefficient Update** | Activates the DC removal filter prior to the echo cancellation module. | | **Echo Cancellation: Enable DC Removal Filter** | Activates the DC removal filter prior to the echo cancellation module. | | **Echo Cancellation: Enabled** | Allow echo cancellation. | | **Echo Cancellation: Gain Power Level** | Echo canceller digital gain level. | | **Echo Cancellation: Non Linear Processor Tune Option** | Which NLP engagement to use: \*Normal: Default level of non-linear processing engagement of the echo cancellation module. | ## G | Parameter | Description | | -------------------- | -------------------------------------------------------------- | | **G726 AAL2 format** | G726 RTP payload formats matching the packetization of I.366.2 | ## J | Parameter | Description | | ---------------------------------- | -------------------------------------------------------------------------------------------------------------------- | | **Jitter Buffer: Initial Depth** | Initial depth of the received packets jitter buffer. | | **Jitter Buffer: Minimum Depth** | Minimum depth of the received packets jitter buffer. | | **Jitter Buffer: Smooth deletion** | Allow the dropping of data from the jitter buffer in a way that is less audible than when whole packets are dropped. | ## L | Parameter | Description | | ------------------------------- | ------------------------------------------------------------- | | **LCP maximum polling failure** | Maximum missed LCP echo responses before declaring link down. | | **LCP polling interval** | Time interval between LCP echo request to server. | ## N | Parameter | Description | | ----------------- | --------------------------------------------------------------------- | | **No Rx Packets** | Terminate the call if no RTP packets were received for this duration. | ## P | Parameter | Description | | ------------ | --------------------------------------------------------------------------- | | **Port Max** | The Port Max parameter is used to set a maximum value for an IP port range. | ## R | Parameter | Description | | ------------------------------- | ------------------------------------------------------------------------------------------- | | **RTCP: Enabled** | Use RTCP on this RTP stream. | | **RTCP: SDES-CNAME** | SDES (Source DEScription) in RTCP packets. | | **RTCP: Transmission Interval** | The interval (in seconds) between RTCP transmissions. | | **RTCP: Use XRTCP** | Use extended RTCP. | | **RTP Port max** | Last port included in this port range (legal values are 1024-65535, odd ports are skipped) | | **RTP Port min** | First port included in this port range (legal values are 1024-65535, odd ports are skipped) | ## T | Parameter | Description | | --------------------------------------------- | -------------------------------------------------------- | | **TDM Line: Subject to Electric/Hybrid Echo** | TDM calls using this profile are subject to hybrid echo. | ## U | Parameter | Description | | ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Use RTP no-anchoring** | What is "RTP no-anchoring?" RTP no-anchoring is a variant of low-delay media relay where the RTP packets are not "anchored" to the SBC (not going through the SBC). | --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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