Ignore Out Of Sequence Errors - Mitel 6867i Administrator's Manual

CONFIGURING THE DNS QUERY METHOD
You can configure the DNS query method for the phone to use for performing DNS lookups
using the following parameter in the configuration files:
• sip dns query type
CONFIGURATION FILES
For the specific parameter you can set in the configuration files, see Appendix A, the section,
"DNS Query Setting"

IGNORE OUT OF SEQUENCE ERRORS

An Administrator can configure the phone via the "sip accept out of order requests" parameter
to ignore CSeq number errors on all SIP dialogs on the phone. When this parameter is enabled,
the phone 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.
Note: As the default Asterisk configuration does not fully track dialogs through a reboot,
it is recommended that this parameter be enabled when using the BLF feature with an
Asterisk server. If you do not enable this feature, then rebooting the Asterisk server may
cause BLF to stop working. With this parameter enabled, the BLF key starts working
again when the phone re-subscribes, which by default, are one hour apart.
An Administrator can enable/disable this feature using the configuration files only.
ENABLING/DISABLING "OUT OF ORDER SIP REQUESTS"
Use the following procedure to enable/disable "out of order SIP requests".
CONFIGURATION FILES
For the specific parameter you can set in the configuration files, see Appendix A, the section,
"Ignore Out of Order SIP Requests"
"EARLY-ONLY" PARAMETER IN REPLACES HEADER RFC3891
The phones support the "early-only" parameter in the "Replaces" header as referenced in
RFC3891. When the phone receives a Replaces header with the early-only parameter, it
replaces the existing dialog if the call is still in the early state. If the call has been answered,
then the Replaces request is rejected.
Note: This feature is not supported in outgoing requests.
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Advanced Operational Features
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