Matrix SPARSH VP710, User Manual, Page: 610 / 1046

602 Matrix SPARSH VP710 User Guide
The IP phone picks the first record, because its order of 90 is lower than 100.
The pref parameter is unimportant as there is no other record with order 90.
The flag "s" indicates performing the SRV query next.
TCP will be used, targeted to a host determined by an SRV query of "_sip._tcp.matrix.pbx.com". If the flag of the
NAPTR record returned is empty, the IP phone will perform NAPTR query again according to the previous NAPTR
query result.
SRV (Service Location Record)
The IP phone performs an SRV query on the record returned from the NAPTR for the host name and the port
number. Example of SRV records:
Priority Weight Port Target
IN SRV 0 1 5060 server1.matrix.pbx.com
IN SRV 0 2 5060 server2.matrix.pbx.com
Parameters are explained in the following table:
SRV query returns two records.
The two SRV records point to different hosts and have the same priority 0. The weight of the second record is
higher than the first one, so the second record is picked first. The two records also contain a port “5060”, the IP
phone uses this port. If the Target is not a numeric IP address, the IP phone performs A query. So in this case, the
IP phone uses “server1.matrix.pbx.com" and “server2.matrix.pbx.com" for the A query.
service
Specify the transport protocols:
SIP+D2U: SIP over UDP
SIP+D2T: SIP over TCP
SIP+D2S: SIP over SCTP
SIPS+D2T: SIPS over TCP
regexp Always empty for SIP services.
replacement Specify a domain name for the next query.
Parameter Description
Priority
Specify preferential treatment for the specific host entry. Lower priority is
more preferred
.
Weight
When priorities are equal, weight is used to differentiate the preference.
The preference is from highest to lowest. Keep the same to load balance.
Port Identify the port number to be used.
Target Identify the actual host for an A query.