Maintenance - Time & Language; Maintenance - Security Settings - Grandstream Networks GAC2500 Administration Manual

Security Mode
Defines the security mode used for the wireless network when the SSID is hidden.
for Hidden SSID
Maintenance – Time & Language
Table 36: Maintenance – Time & Language
Specify NTP Server Defines the URL or IP address of the NTP server. The phone may obtain the current date and time
Address information from the server. The default setting is "pool.ntp.org".
DHCP Option 42 Defines whether DHCP Option 42 should override NTP server or not. When enabled, DHCP Option
override NTP server 42 will override the NTP server if it's set up on the LAN. The default setting is "Yes".
DHCP Option 2 to Allows device to get provisioned for Time Zone from DHCP Option 2 in the local server
override Time Zone automatically. If it set to "Yes", the DHCP offer with Option 2 will override the phone system's time
setting zone setting. The default setting is "No".
Specifies the local time zone for the phone. It covers the global time zones and user can select the
Time Zone
specific one from the drop-down list.
Use 24-hour format Use 24-hour time display format.
Configures the date display format on the LCD.
The following formats are supported:
Normal (M/DD/YYYY): 1/31/2012
Date Display Format YYYY/MM/DD: 2012/01/31
MM/DD/YYYY: 01/31/2012
DD/MM/YYYY: 31/01/2012
The default setting is DD/MM/YYYY.
Language Configures the language on device.
Maintenance – Security Settings
Table 37: Maintenance – Security Settings
Emergency
Call Configures emergency call numbers.
Numbers
Disable SSH Blocks any SSH access to the phone. The default setting is "No".
Disable web
If set to "Yes", the GAC will not allow any web access to it. The default value is "No".
GUI
Access Determines which protocol will be used to access the phone 's Web GUI. It can be selected from HTTP and
Method HTTPS. The default setting is HTTP.