Aastra BLUESTAR 8000I, Pbx-Mode Administrator Manual

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Advanced Operational Features
41-001390-00 Rev 02 – 12.2011
5-6
Configuring the DNS Query Method
You can configure the DNS query method for the BluStar 8000i to use for performing DNS lookups using the “ sip dns
query type ” parameter in the configuration files.
Ignore Out of Sequence Errors
An administrator can configure the BluStar 8000i via the “ sip accept out of order requests ” parameter to ignore CSeq
number errors on all SIP dialogs on the
BluStar
8000i. When this parameter is enabled, the
BluStar
8000i no longer verifies
that the sequence numbers increase for each message within a dialog, and does not report a "CSeq Out of Order" error if
they do not increase.
Enabling/Disabling “Out of Order SIP Requests”
Use the following procedure to enable/disable out of order SIP requests:
Switching Between Early Media and Local Ringing
Upon receiving a 180 response, the BluStar 8000i generates a local ring tone unless it is receiving an early media flow.
Configurable “Allow” and “Allow-Event” Optional Headers
On the BluStar 8000i, an administrator can enable or disable whether or not the optional “Allow” and “Allow-Events” head-
ers are included in the NOTIFY message from the BluStar 8000i. SIP NOTIFY messages from the BluStar 8000i may contain
optional headers called “Allow” and “Allow-events”. If the NOTIFY message contains these headers, the UDP packet
returned by the server may be too large and may fragment the packet.
To prevent the fragmenting of the UDP packet, the “Allow” and “Allow-events” headers may be removed using the param-
eter, “
sip notify opt headers ”. If this parameter is set to “0” (disabled), the optional headers are not included in the SIP
NOTIFY message, which reduces the size of the packet returned by the server, and prevents fragmentation of the packet.
The value set for this parameter specifies whether or not to include the optional headers in the SIP NOTIFY message from
the BluStar 8000i. An administrator can enable/disable the optional “Allow” and “Allow-Event” headers using the “
sip
notify opt headers ” parameter in the configuration files.
Configuration Files
For the specific parameter(s) you can set in the configuration files, see Appendix A, the section, DNS Query Setting on
page A-46 .
Configuration Files
For the specific parameter(s) you can set in the configuration files, see Appendix A, the section, Ignore Out of Order SIP
Requests on page A-47 .