# No audio during the first five seconds of a VoIP call when using SecureXL

**Product:** SecureXL  
**Version:** R81.10 (EOS), R81.20, R82  
**Last Modified:** 2026-05-25

## Symptoms

- There is no audio during the first five seconds of each VoIP RTP call (or the other side hears the audio after a delay of five seconds) when using SecureXL.

This applies to one-sided audio and no audio scenarios.

- Configuring SecureXL to always forward the affected connections (F2F) to the Security Gateway does not resolve the issue.

- Configuring the value **0** for these kernel parameters resolves the issue:

- 'cphwd_routing_interval' from the default '5' to '0':
    
    `fw ctl set int cphwd_routing_interval 0`
  
  - 'sim_routing_interval' from the default '5000' to '0':
    
    `fw ctl set int sim_routing_interval 0 -a`
- Output of the `# fw ctl get int cphwd_routing_interval` command:

- `cphwd_routing_interval = 5`

Output of the `# fw ctl get int sim_routing_interval -a` command:

- `FW: Get operation failed: failed to get parameter sim_routing_interval`
  - `PPAK 0: sim_routing_interval = 5000`

Note: You can ignore `FW: Get operation failed: failed to get parameter sim_routing_interval`, as this is not a FW parameter. This is a parameter for SecureXL (PPAK as seen in the output) and you must include the “-a” at the end of the second command.

## Cause

Routing calculation in SecureXL takes five seconds for the data connections.

## Solution

This problem was fixed. The fix is included in:

- [Jumbo Hotfix Accumulator for R82](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 10  
- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 96  
- [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 173

If you choose not to upgrade, Check Point can supply a **Hotfix**. [Contact Check Point Support](https://www.checkpoint.com/support-services/.contact-support/) to get a Hotfix for this issue.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.

For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**

Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

#### NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties
**Access Level:** General  
**Status:** Approved by TAC  
**Date Created:** 2024-10-07  
**Last Modified:** 2026-05-25