Grandstream Networks Budge tone 100 User Manual page 4

6. NAT Traversal: Select [Yes].
STUN Server (Optional)
7. Voicemail User ID: 999, if
available, subscribe for MWI:
Select [Yes]
DTMF: RTP (RFC2833)
8. NTP Server: Enter
[ntp.jst.mfeed.ad.jp].
9. Click [Update] to save
changes.
* Once done, click [Reboot] to
4
reset and save current
configurations.