8028 SIP Doorphone (G2) FW 3.2
Backup Server #1
If primary server is unreachable the 8028 SIP Doorphone will attempt to register with the
backup servers. If enabled, the 8028 SIP Doorphone will always attempt to register with
the highest priority server.
Backup Server #2
If backup server #1 is unreachable the 8028 SIP Doorphone will attempt to register with
the 2nd backup server. If enabled, the 8028 SIP Doorphone will always attempt to register
with the highest priority server.
Polling Intervals (seconds)
Time period between sending monitoring packets to each server. Non-active servers are
always polled, and active server may optionally be polled (see below).
Poll Active Server
Explicitly poll current server to monitor availability. May also be handled automatically by
other regular events, so can be disabled to reduce network traffic.
Automatic Fallback
Reconnect with higher priority server once available, even if backup connection is still fine.
Polling Method
SIP message used to poll servers to monitor availability.
Keep-alive Method
If Double CRLF is selected the 8028 SIP Doorphone will send a packet every 30 seconds
(unless changed) to maintain connection with the SIP Server if behind NAT.
Keep-alive Interval
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 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, allow SIP NOTIFY messages that do not contain a "Subscription-State"
header.
Document 90-00104
05/21/2020
Page 46
Algo Communication Products Ltd
4500 Beedie St Burnaby BC Canada V5J 5L2
www.algosolutions.com
(604) 454-3792
support@algosolutions.com
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