User guide

5.6.8 Application (UPnP)
UPnP NAT and Firewall Traversal allow traffic to pass-thru the ADSL Router for applications using the
UPnP protocol. This feature requires one active DSL connection. In presence of multiple DSL
connections, select the one over, which the incoming traffic will be present, for example the default
Internet connection.
To enable UPnP, you must first have a WAN connection configured. Once a WAN connection is
configured, click Advanced and under Advanced, select UPnP. This will bring up the screen shown in
Figure 13. You must enable UPnP and then select which connection will utilize UPnP. In this case the
PPPoA connection is enabled. See Fig 1-23
Figure 1-23 : UPnP
5.6.9 SNTP
SNTP (Simple Network Timing Protocol) is a protocol used to synchronize the system time to the public
SNTP servers. It uses the UDP protocol on port 123 to communicate between clients and servers. When
the SNTP feature is enabled, your AD 2730, AD 2735 will start querying for the time clock information
from the primary SNTP server. If it fails to get a valid response within the “timeout” period, it will try for
“retry” number of times, before moving to the Secondary SNTP server. If it fails to get a valid response
from Secondary STNP server within valid retry times, it starts querying Tertiary SNTP server. If it fails to
get a valid response from all the servers, then the program stops. When a valid response is received from
one of the server, the program sleeps for “Polling_interval” amount of minutes, before starting the whole
process again.
Use the following procedures to enable SNTP.
1. Check Enable SNTP.
2. Primary SNTP Server - The IP address or the host name of the primary SNTP server.
3. Secondary SNTP Server - The IP address or the host name of the secondary SNTP server.
4. Tertiary SNTP Server - The IP address or the host name of the tertiary SNTP server.
5. Timeout - If the router failed to connect to a SNTP server within the ‘Timeout’ period, it will retry the
connection.
Polling Interval - Time betwe6. en a successful connection with a SNTP server and a new attempt to
7. 30, AD 2735 will try to connect to an SNTP
erver in line.
connect to an SNTP server.
Retry Count - The number of times the Microcom AD 27
server before it try to connect to the next s