Grandstream Networks HT502 User Manual page 42

Dual fxs port analog telephone adaptor

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Use STUN to detect

Use STUN keep-alive to detect WAN side network problems. If keep-alive request

network

does not yield any response for configured number of times, the device will restart

connectivity

the TCP/IP stack. If the STUN server does not respond when the device boots up,

the feature is disabled.

Firmware Upgrade

Enables HT502 to download firmware or configuration file through either the TFTP,

and Provisioning

HTTP or HTTPS server.

Via TFTP Server

This is the IP address of the configured TFTP server. If selected and it is non-

zero or not blank, the HT502 retrieves the new configuration file or new code image

from the specified TFTP server at boot time. After 5 attempts, the system will

timeout and will start the boot process using the existing code image in the Flash

memory. If a TFTP server is configured and a new code image is retrieved, the

new downloaded image is saved into the Flash memory.

Note: Please do NOT interrupt the TFTP upgrade process (especially the power

supply) as this will damage the device. Depending on the local network, this

process can take up to 15 or 20 minutes.

Via HTTP / HTTPS

The URL for the HTTP/HTTPS server used for firmware upgrade and configuration

via HTTP.

Server

For

http://provisioning.mycompany.com:6688/Grandstream/1.0.0.67":6688"

specific TCP port where the HTTP or HTTPS server is listening; it can be omitted

if using default port 80.

Note: If Auto Upgrade is set to No, HT502 will only do HTTP/HTTPS download

once at boot up.

HT502 User Manual

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