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Grandstream Networks, Inc. HT-502 User Manual Page 22 of 32
Firmware 1.0.0.77 Last Updated: 1/2008
Config File Postfix Default is blank. End user should keep it blank.
Allow DHCP Option 66
to override server
If set to “Yes”, configuration and upgrade server information can be obtained using DHCP
option 66 from DHCP server located in customer’s environment.
Automatic Upgrade
Choose “Yes” to enable automatic upgrade and provisioning. In “Check for new firmware
every” field, enter the number of days to enable HT502 to check the server for firmware
upgrade or configuration in the defined period of days. When set to No, HT502 will only
do upgrade once at boot up. “Always check for New Firmware.” Check New Firmware
only when F/W pre/suffix changes”
Firmware Key
Used for firmware encryption. Should be 32 digit in hexadecimal representation. End
user should keep it blank.
Authenticate Conf File
If set to Yes, config file is authenticated before acceptance. This protects the
configuration from an unauthorized change.
Firmware Key
Used for firmware encryption. Should be 32 digit in hexadecimal representation. End
user should keep it blank.
SSL Certificate
The user specified SSL certificate used for SIP over TLS in X.509 format.
SSL Private Key
The user specified SSL private key used for SIP over TLS in X.509 format.
SSL Private Key
Password
User specified password to protect the private key above.
System Ring Cadence
Configuration option is set ring cadence on all FXS ports for all incoming calls. (Syntax:
c=on1/off1-on2/off2-on3/off3; [...]) Default is set to c=2000/4000; (US standards)
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)
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-IP
Calling
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.
Syslog Server
The IP address or URL of System log server. This feature is especially useful for the ITSP
(Internet Telephone Service Provider)