Grandstream Networks, Inc. HT-502 User Manual Page 27 of 35
Firmware 1.0.0.39 Last Updated: 03/2007
Mode INVITE for T.38 or Fax Pass Through.
Jitter Buffer Type Select either Fixed or Adaptive based on network conditions.
Jitter Buffer Length Select Low, Medium or High based on network conditions.
SLIC Setting Dependent on standard phone type (and location)
Caller ID Scheme • Bellcore/Telcordia
• ETSI-FSK
• ETSI-DTMF
• SIN 227 - BT
• NTT Japan
Polarity Reversal Default is No. If set to “Yes”, polarity will be reversed upon call establishment
and termination.
Loop Current
Disconnect Set it to Yes if the traditional PBX you are using with HT502 uses this method
for signaling call termination. Default is No.
Hook Flash Timing Time period when the cradle is pressed (Hook Flash) to simulate FLASH. To
prevent unwanted activation of the Flash/Hold and automatic phone ring-back,
adjust this time value.
Gain Handset volume adjustment.
• RX is for receiving volume,
• TX is for transmission volume.
Default values are 0dB for both parameters. Loudest volume: +6dB Lowest
volume: -6dB.
Call Progress/ Ring
Tones Configure ring or tone frequencies according to preference. By default tones
are set to North American frequencies. Frequencies should be configured with
known values to avoid uncomfortable high pitch sounds.
SAVING THE CONFIGURATION CHANGES
Click the “Update” button in the Configuration page to save the changes to the HT–502 configuration. The
following screen confirms that the changes are saved. Reboot or power cycle the HT–502 to make the
changes take effect.
FIGURE 4: SCREENSHOT OF SAVE CONFIGURATION PAGE
Remotely reboot the HT–502 by clicking the “Reboot” button at the bottom of the configuration page.
When finished, re-login to the HT–502 after waiting for about 30 seconds.