Running The Tcpdump Tool; Activating Dsp Recording; Deactivating Dsp Recording - AudioCodes C450HD User's And Administrator's Manual

CHAPTER 7 Troubleshooting
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To capture the phone screen:
1. Access the phone via SSH
2. Run a TFTP client on your PC
3. Set the phone to the screen to capture
4. Run the commands:
✔
screencap /sdcard/screen_cap.png
✔
curl -T /sdcard/screen_cap.png tftp://host_ip

Running the tcpdump Tool

Running under the command line, this common packet analyzer allows network administrators to
display TCP/IP and other packets transmitted or received over the IP telephony network.
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To run tcpdump:
1. Access the phone via SSH and run the following commands:
cd /storage/emulated/0/
mkdir recording
cd recording/
tcpdump -w rtp.pcap
2. After running TCPDump, reproduce the issue.
3. Press Ctrl+C to stop TCPDump:
curl -T /storage/emulated/0/recording/rtp.pcap tftp://host_ip/rtp.pcap

Activating DSP Recording

Network administrators can activate DSP recording using SSH protocol.
➢
To activate DSP recording using SSH protocol, type the following at the shell prompt:
setprop ac.dr_voice_enable true
setprop ac.dr_ipaddr <ip_address>
setprop ac.dr_port 50000
DSP recording can be activated on the fly without requiring the network administrator to
reset the phone.

Deactivating DSP Recording

Network administrators can deactivate DSP recording using SSH protocol.
➢
To deactivate DSP recording using SSH protocol, type the following at the shell
prompt:
setprop ac.dr_voice_enable false
C450HD IP Phone for Microsoft Teams Application User's and Administrator's Guide
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