Aastra Telecom 53I, 57I CT, 55I manual Blacklist Duration Broadsoft Servers

Configuring Advanced Operational Features

Advanced Operational Features

Blacklist Duration (Broadsoft Servers)

The Blacklist Duration feature on Broadsoft Servers helps to reduce unnecessary delays during proxy/registrar server failures, caused by the IP phone repeatedly sending SIP messages to a failed server. If you enable this feature, then whenever the IP phone sends a SIP message to a server, and does not get a response, the phone automatically adds the server to the blacklist. The IP phone avoids sending messages to any servers on the blacklist. If all servers are on the blacklist, then the IP phone attempts to send the message to the first server on the list.

You can specify how long failed servers remain on the blacklist in the IP phone’s configuration file or in the Aastra Web UI. The default setting is 300 seconds. If you set the duration to 0 seconds, then you disable the blacklist feature.

Configuring Blacklist Duration Using the Configuration Files

Use the following parameter to configure the Blacklist Duration in the configuration files:

•sip blacklist duration

Configuration Files

For the specific parameters you can set in the configuration files for setting Blacklist Duration, see Appendix A, the section, “Transport Layer Security (TLS) Settings” on page A-72.

Advanced Operational Features

41-001160-00, Release 2.1, Rev 04 6-17