> For the complete documentation index, see [llms.txt](https://tmediadocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tmediadocs.telcobridges.com/operations-and-support/troubleshooting/rtp-codecs-tones/voip-ethernet-capture-freesbc.md).

# VoIP Ethernet Capture on a ProSBC

|                          |             |             |
| ------------------------ | ----------- | ----------- |
| This article applies to: | **Product** | **Version** |
| SBC                      | 3.1, 3.3    |             |

### Capturing VoIP and Ethernet traffic

* Connect to the SBC using a ssh connection
* Start tbx\_cli\_tools\_remote (type "tbx\_cli\_tools\_remote")

The following is displayed:

`Available remote hosts to control (TBX_GW_PORT=12358, local IPs 172.16.0.1 / 172.18.0.1). Press corresponding letter to`\
`control:`\
`a : TB016634.tbrouter`\
`b : TB016635.gateway`\
`c : TB016635.logtrace`\
`d : TB016635.stream_server`\
`e : TB016635.tboam_app`\
`f : TB016635.tbrouter <------------tbrouter`\
`g : TB016635.tbsnmpagent`\
`h : TB016635.tbsyslog`\
`i : TB016635.tbuctwriter`\
`j : TB016635.toolpack_engine`\
`k : TB016635.toolpack_sys_mgr`\
`l : TB016635.web_server`

* Connect to the tbrouter application
* Start capture using the 'p' key (lowercase p), leave default parameters and press 'enter'
* Stop capture using the 'p' key (lowercase p)

### Retrieve VoIP captures

VoIP capture files (pcap/Wireshark compatible) are locate here:

`/lib/tb/toolpack/tbrouter/pcap`

To download the voip capture file, use sFTP on the management port. This can be done on Windows using tools like Filezilla or WinSCP. **Note**: There can be multiple capture files per capture session (for example, on systems with 10Gbps network devices, because Ethernet packets on these devices are spread to multiple packets processing/capture cores)


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