Grandstream Networks HT502 User Manual page 39

Call Progress Tones
Using these settings, users can configure tone frequencies and cadence according to
their preference. By default they are set to North American frequencies. Configure these
settings with known values to avoid uncomfortable high pitch sounds. ON is the period of
ringing ("On time" in 'ms') while OFF is the period of silence. In order to set a continuous
tone, OFF should be zero. Otherwise it will ring ON ms and a pause of OFF ms and then
repeat the pattern.
Example configuration for N.A. Dialtone:
f1=350@-13,f2=440@-13,c=0/0;
Syntax: f1=freq@vol, f2=freq@vol, c=on1/off1-on2/off2-on3/off3; [...]
(Note: freq: 0 - 4000Hz; vol: -30 - 0dBm)
Prompt Tone Access
Key pattern to get Prompt Tone. Maximum 20 digits. No Default.
Code
Phone LED Pattern Choose LED Pattern rules:
Pattern A (Onhook: OFF; Offhook: ON; VM: Blink)
Pattern B (Onhook: ON; Offhook: OFF; VM: Blink if phone onhook)
Lock Keypad Update If set to "Yes", the configuration update via keypad is disabled.
Disable Voice Prompt Default is No. Disables the voice prompt configuration.
Disable Direct IP Call Default is No. Disables the Direct IP Call function.
NTP server URI or IP address of the NTP (Network Time Protocol) server. This parameter
synchronizes the date and time.
NTP Update Interval Default is 1440. Updates the Network Time Protocol (Values range from 5 – 1440
minutes)
Syslog Server The IP address or URL of System log server. This feature is especially useful for the ITSP
(Internet Telephone Service Provider)
FIRMWARE VERSION 1.0.12.4 HT502 USER MANUAL Page 37 of 54