Linksys ATA Administration Guide
27
ATA Software Features
Introducing Linksys Analog Telephone Adapters
DHCP Renewal on
Timeout
Linksys SPA2102, SPA3102, and PAP2T voice devices typically operate in a
network where a DHCP server assigns IP addresses to the devices. Because IP
addresses are a limited resource, the DHCP server periodically renews the
device lease on the IP address. Therefore, if a Linksys ATA device loses its IP
address for any reason, or if some other device on the network is assigned its
IP address, the communication between the SIP proxy and the device is
either severed or degraded.
Whenever an expected SIP response is not received within a programmable
amount of time after the corresponding SIP command is sent, the DHCP
Renewal on Timeout feature automatically causes the device to request a
renewal of its IP address. If the DHCP server returns the IP address that it
originally assigned to the device, the Linksys ATA device is presumed to be
operating correctly. If it returns a different address, the ATA device changes
its IP address to the new address provided by the DHCP server. The Linksys
ATA device then resets, and once again sends a SIP register request for the
DHCP server to accept.
Feature
Description