ptp-d: ptp clock delay. ptp clock offset to master clock. This value should not exceed 500ns for a longer time
dls-d: Measured offset of the local DECT-SYPO signal to the master DECT-SYPO signal. This is the DECT-SYNC criteria and should not exceed 1000ns for a longer time
ptp-pd: ptp path delay. This is an indication of the transmission path quality. The account of switches and their processing speed and queue delay's influence this value. Jitter should be as less as possible.
The latest LAN sync output for more detailed information see this wiki page.