AudioCodes Mediant 500 E-SBC, Руководство пользователя

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User's Manual 11. Date and Time
Version 6.8 103 Mediant 500 E-SBC
11 Date and Time
The date and time of the device can be configured manually or it can be obtained
automatically from a Simple Network Time Protocol (SNTP) server.
11.1 Configuring Date and Time Manually
You can manually configure the date and time of the device (instead of using an NTP
server), as described in the procedure below. You can also configure the following with
your manually configured date and time:

Daylight Saving Time (DST) - see 'Configuring Daylight Saving Time' on page 105.

UTC time offset (e.g., GMT +1). To configure the offset, use the 'NTP UTC Offset'
(NTPServerUTCOffset) parameter (see 'Configuring Automatic Date and Time using
SNTP' on page
103 ) .

To manually configure the device's date and time, using the Web interface:
1. Open the Regional Settings page ( Configuration tab > System menu > Regional
Settings ).
Figure 11-1: Regional Settings Page
2. Enter the current date and time of the geographical location in which the device is
installed.
3. Click Submit .
Notes:
•
If the device is configured to obtain the date and time from an SNTP server, the
fields on this page are read-only, displaying the received date and time.
•
After performing a hardware reset, the date and time are returned to their defaults
and thus, should be updated.
11.2 Configuring Automatic Date and Time using SNTP
The device's Simple Network Time Protocol (SNTP) client functionality generates requests
and reacts to the resulting responses using the NTP Version 3 protocol definitions
(according to RFC 1305). Through these requests and responses, the device, as an NTP
client, synchronizes the system time to a time source within the network, thereby
eliminating any potential issues should the local system clock 'drift' during operation. The
NTP client follows a simple process in managing system time: the NTP client requests an
NTP update, receives an NTP response, and then updates the local system clock based on
an NTP server within the network. The client requests a time update from the user-defined
NTP server (IP address or FQDN) at a user-defined update interval. Typically, this update
interval is every 24 hours based on when the system was restarted.
You can also configure a time offset for the time received from the NTP server, according
to your region. For example, Germany Berlin region is UTC/GMT +1 hours and therefore,
you would configure the offset to "1". For USA New York, the UTC/GMT offset is -5 hours
and therefore, the offset is a minus value and configured as "-5". To configure Daylight
Saving Time (DST), see 'Configuring Daylight Saving Time' on page
105 .
You can also configure the device to authenticate and validate the NTP messages received
from the NTP server. Authentication is done using an authentication key with the MD5