Algo 8410 User Manual page 72

8410 IP Display Speaker &
8420 IP Dual-Sided Display Speaker
Polling Method
A SIP message used to poll servers to monitor availability.
Interoperability
Keep-Alive Method
If Double CRLF is selected, the 8410/8420 will send a packet every 30 seconds (recommended value) to maintain
connection with the SIP Server if behind NAT.
Keep-Alive Interval
This is the interval in seconds that the CRLF message should be sent.
Use Outgoing TLS port in SIP Headers
Use ephemeral port number from outgoing SIP TLS connection instead of the listening port number in SIP Contact and
Via headers. This is useful to connect the device to some local SIP servers, like Asterisk or FreeSWITCH.
Do Not Reuse Authorization Headers
When enabled, all SIP authorization information from the last successful request will not be reused in the next
request.
Allow Missing Subscription-State Headers
When enabled, this allows SIP NOTIFY messages that do not contain a 'Subscription-State' header.
AL061-UG-GP258410-001-R0 support@algosolutions.com Page 71