Polycom VVXTM 1500 - Manual (Page 181)

Using the Advanced Features of Your Phone
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2. Tap the file you want to play back, and then tap the Open soft key.
The filename you selected displays. The length of the file (in hours,
minutes, and seconds) and the size of the file also display.
3. Tap the Play soft key.
“Playing” displays on the screen. The position indicator (in hours,
minutes, and seconds) above the progress bar changes as the file plays
back in real time.