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| CPE SIP Products |
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| Parameter | Description |
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| CRLF |
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| [UsePingPongKeepAlive] | Determines whether the |
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| (CRLF) |
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| used for reliable, |
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| [0] Disable (default) |
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| [1] Enable |
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| The SIP user agent/client (i.e., device) uses a simple periodic |
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| message as a |
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| registrar alive (used for example, to keep NAT bindings open). For |
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| CRLF. This mechanism uses a |
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| corresponding |
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| sequence allows the client, and optionally the server, to tell if its flow is |
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| still active and useful for SIP traffic. If the client does not receive a |
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| pong in response to its ping, it declares the flow “dead” and opens a |
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| new flow in its place. In the CRLF |
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| periodically sends a |
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| single CRLF (the "pong"). If the client does not receive a "pong" within |
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| an appropriate amount of time, it considers the flow failed. |
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| Note: The device sends a CRLF message to the Proxy Set only if the |
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| Proxy |
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| enabled and its transport type is set to TCP or TLS. The device first |
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| sends a SIP OPTION message to establish the TCP/TLS connection |
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| and if it receives any SIP response, it continues sending the CRLF |
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| Defines the periodic interval (in seconds) after which a “ping” (double- |
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| [PingPongKeepAliveTime] | CRLF) |
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| Alive mechanism. |
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| The default range is 5 to 2,000,000. The default is 120. |
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| The device uses the range of |
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| the actual interval. For example, if the parameter value is set to 200 |
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| sec, the interval used is any random time between 160 to 200 |
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| seconds. This prevents an “avalanche” of |
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| UAs to a specific server. |
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| RTCP XR Parameters |
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| Enable RTCP XR | Enables voice quality monitoring and RTCP XR, according to |
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| [VQMonEnable] |
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| [0] Disable = Disable (default) |
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| [1] Enable = Enables |
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| Note: For this parameter to take effect, a device reset is required. |
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| Minimum Gap Size | Voice quality monitoring - minimum gap size (number of frames). The |
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| [VQMonGMin] | default is 16. |
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| Burst Threshold | Voice quality monitoring - excessive burst alert threshold. if set to |
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| [VQMonBurstHR] | (default), no alerts are issued. |
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| Delay Threshold | Voice quality monitoring - excessive delay alert threshold. if set to |
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| [VQMonDelayTHR] | (default), no alerts are issued. |
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SIP Release Notes | 90 | Document #: |