Snom VoIP Phone - Manual (Page 66)

Settings
66
Memory
See the current memory usage of your phone.
DNS Cache
An option to look into the current DNS cache.
PCAP Trace
Create packet traces from current network traffic right on your phone!
This is a really powerful tool to find out what is going on in the network
around your phone.
Settings
Displays all settings of your phone including their current values.