Clock (Date and Time) Synchronization Parameters

Enables the device (as an NTP client) to synchronize its local clock (date and time) with an NTP server.

Assigns an IP Interface from the IP Interfaces table (see Configuring IP Network Interfaces) for NTP communication.

By default, the IPv4 OAMP interface is assigned.

Note: The IP address version (IPv4 or IPv6) of the assigned IP Interface and the NTP server's address (see 'Primary NTP Server Address' and 'Secondary NTP Server Address' parameters) must be the same.

Defines the address (IPv4 or IPv6, or FQDN) of the primary (main) NTP server. The benefit of using an FQDN is that multiple IP addresses can be resolved from the DNS server, providing NTP server redundancy.

The default IP address is 0.0.0.0.

Note: The IP address version (IPv4 or IPv6) of the NTP server's address and the assigned IP Interface (see 'NTP Interface' parameter) must be the same.

Defines the address (IPv4 or IPv6, or FQDN) of the secondary NTP server. This NTP is used for redundancy; if the primary NTP server fails, then this NTP server is used.

The default IP address is 0.0.0.0.

Note: The IP address version (IPv4 or IPv6) of the NTP server's address and the assigned IP Interface (see 'NTP Interface' parameter) must be the same.

Defines the time interval (in seconds) that the NTP client requests for a time update.

The default interval is 86400 (i.e., 24 hours). The range is 0 to 214783647.

Note: It is not recommend to set the parameter to beyond one month (i.e., 2592000 seconds).

Defines the NTP authentication key identifier for authenticating NTP messages. The identifier must match the value configured on the NTP server. The NTP server may have several keys configured for different clients; this number identifies which key is used.

The valid value is 1 to 65535. The default is 0 (i.e., no authentication is done).

Defines the secret authentication key shared between the device (client) and the NTP server for authenticating NTP messages.

The valid value is a string of up to 32 characters. By default, no key is defined.

Note: The parameter cannot be configured with wide characters.

Defines the Universal Time Coordinate (UTC) offset (in seconds) from the local time.

The valid range is -86400 seconds (i.e., -24 hours) to +86400 seconds (i.e., +24 hours). The default is 0.

Note: The offset setting is applied only on the hour. For example, if you configure the parameter at 15:42, the device applies the setting only at 16:00.

Enables daylight saving time (DST).

Defines the date and time when DST begins. This value can be configured using any of the following formats:

For example, "05:01:08:00" denotes daylight saving starting from May 1 at 8 A.M.

For example, "04:FRI/03:23:00" denotes Friday, the third week of April, at 11 P.M. The week field can be 1-5, where 5 denotes the last occurrence of the specified day in the specified month. For example, "04:FRI/05:23:00" denotes the last Friday of April, at 11 P.M.

Defines the date and time when DST ends. For a description of the format of this value, see the DayLightSavingTimeStart parameter.

Defines the DST offset (in minutes).

The valid range is 0 to 120. The default is 60.

Note: The offset setting is applied only on the hour. For example, if you configure the parameter at 15:42, the device applies the setting only at 16:00.

Enables the device to obtain its date and time for its internal clock from the SIP Date header in 200 OK messages received in response to sent REGISTER messages.

For more information, see Synchronizing Date and Time through SIP.