AudioCodes Mediant 4000 SBC, User Manual

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CHAPTER 11 Date and Time
Mediant 4000 SBC | User's Manual
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.
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: 1) the NTP client requests an NTP update, 2) receives an NTP response
and then 3) 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, the update interval is every 24 hours based on when the system was
restarted.
You can also configure the device to authenticate and validate NTP messages received from the
NTP server. Authentication is done using an authentication key with the MD5 cryptographic hash
algorithm. When this feature is enabled, the device ignores NTP messages received without
authentication.
The following procedure describes how to configure SNTP through the Web interface. For detailed
descriptions of the configuration parameters, see
NTP and Daylight Saving Time Parameters .
➢
To configure SNTP through the Web interface:
1. Open the Time & Date page ( Setup menu > Administration tab > Time & Date ), and then
scroll down to the NTP Server group:
2. Configure the NTP server address:
● In the 'Primary NTP Server Address' (NTPServerIP) field, configure the primary NTP
server's address (IP or FQDN).
● (Optional) In the 'Secondary NTP Server Address' (NTPSecondaryServerIP) field,
configure the backup NTP server.
3. In the 'NTP Updated Interval' (NTPUpdateInterval) field, configure the period after which the
date and time of the device is updated.
4. Configure NTP message authentication:
● In the 'NTP Authentication Key Identifier' field, configure the NTP authentication key
identifier.
● In the 'NTP Authentication Secret Key' field, configure the secret authentication key
shared between the device and the NTP server.
5. Verify that the device has received the correct date and time from the NTP server. The date
and time is displayed in the 'UTC Time' read-only field under the Time Zone group.
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