Mitel Deutschland GmbH 68635RFP36U-01 ユーザーズマニュアル
Configuration and Administration
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7.20.2 DNS SRV
If a full qualified domain name is configured as proxy, outbound proxy or registrar server and the
respective port setting is set to zero (“0”), the OMM performs a DNS SRV query before an appropriate
SIP transaction is started. Herewith the OMM locates a list of servers responsible for the given SIP
domain. With this configuration, the default port (“5060”) is used for every server address acquired with
this mechanism.
respective port setting is set to zero (“0”), the OMM performs a DNS SRV query before an appropriate
SIP transaction is started. Herewith the OMM locates a list of servers responsible for the given SIP
domain. With this configuration, the default port (“5060”) is used for every server address acquired with
this mechanism.
The DNS SRV results are sorted by priority and weight in ascending order by the OMM. As soon as the
DNS SRV query succeeds, the OMM starts the appropriate SIP transaction by sending the request to the
server with the uppermost priority and weight of the DNS SRV result.
DNS SRV query succeeds, the OMM starts the appropriate SIP transaction by sending the request to the
server with the uppermost priority and weight of the DNS SRV result.
If there is no answer from the first SIP server in a configurable time frame (“Transaction Timer”
parameter), it will be assumed as unreachable and the OMM tries to contact the next server of the DNS
SRV result. Therefore the request will be send to the second server of the DNS SRV query result. If
there is also no answer in the given time frame from the second server, the request will be send to the
third server and so on. When there is an answer from one of the contacted servers, this server will be
used for this transaction.
parameter), it will be assumed as unreachable and the OMM tries to contact the next server of the DNS
SRV result. Therefore the request will be send to the second server of the DNS SRV query result. If
there is also no answer in the given time frame from the second server, the request will be send to the
third server and so on. When there is an answer from one of the contacted servers, this server will be
used for this transaction.