User's Manual
FIRMWARE VERSION 1.0.7.6    HT502 USER MANUAL     Page 34 of 48  
Prompt Tone Access 
Code 
Key pattern to get Prompt Tone. Maximum 20 digits. No Default. 
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 
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) 
Syslog Level 
Select the HT502 to report the log level. Default is NONE. The level is one of DEBUG, 
INFO, WARNING or ERROR. Syslog messages are sent based on the following events: 
1. product model/version on boot up (INFO level) 
2. NAT related info (INFO level) 
3. sent or received SIP message (DEBUG level) 
4. SIP message summary (INFO level) 
5. inbound and outbound calls (INFO level) 
6. registration status change (INFO level) 
7. negotiated codec (INFO level) 
8. Ethernet link up (INFO level) 
9. SLIC chip exception (WARNING and ERROR levels) 
10.  memory exception (ERROR level) 
The Syslog uses USER facility. In addition to standard Syslog payload, it contains the 
following components: 
GS_LOG: [device MAC address][error code] error message 
Example: May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000] Ethernet link 
is up 
Send SIP Log 
If Syslog is enabled and Send SIP Log is set to YES, then SIP messages will also be 
delivered via Syslog. Default is set to NO. 










