SNTP server configuration

Last Updated : Apr 17, 2026 |
Prolog information
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Simple Network Time Protocol (SNTP) is a mechanism that the devices use for time-synchronization. This is possible because of the network time server that runs on the devices.
SNTP specifies the IP address or DNS of the network time server. You can configure SNTP using one of the following methods listed in the table:
No
Method
Notes
1
DHCP option 42
You can configure DHCP option 42 that provides SNTP IP address list. See DHCP options in Related links.
2
46xxsettings.txt file
Use the settings file for configuring date and time using SNTP parameter. See SNTP parameter in Related links.
3
Administration menu on the phone
Use the administration menu to update the SNTP server information on the phone. See IP configuration field description in Related links.
4
Web interface of the phone
Use the IP Configuration field for updating SNTP server information using the web interface of the phone. See Ethernet settings field descriptions in Related links.
On Avaya J100 Series IP Phones, the value of SNTPSRVR parameter can be a comma-separated list of SNTP server addresses, which can be IPv4 or IPv6 addresses. This parameter has following values:
0.avaya.pool.ntp.org,1.avaya.pool.ntp.org,2.avaya.pool.ntp.org, 3.avaya.pool.ntp.org
If these servers are not reachable, you can configure the phone with an alternate list of SNTP servers. Set the SNTPSRVR parameter value in the 46xxsettings.txt file to ntpserver-1,ntpserver-1,ntp-server-2. It provides IP address or FQDN of the desired NTP server(s). Specifying the correct SNTPSRVR prevents the delay caused by the phone waiting for NTP server timeouts.
Related information
SNTP Parameters
DHCP options
IP configuration field description
Ethernet settings field descriptions