1531-DBC 422 02 Uen B3 2013-12-02
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I
NSTALLATION
this case the phone will get the SW server IP address from DNS
SRV.
•
The IP address to the IP Phone Administrator server.
•
The IP address to the SIP proxy server
The DNS SRV handling does only work when DHCP is used and when
the DHCP server points out the DNS server and when a domain name
is received in DHCP option 15. This service is described in the RFC
2782.
With this method the phone sends a request to the DNS server to get a
particular service. This is an advantage compared to using option 43 in
the DHCP messages, which all the devices on the LAN receive. If a
device does not handle option 43 in a correct way, this can cause prob-
lems for this device.
In the answer from the DNS server the phone can get a list with hosts.
7.10.1
Enter data in DNS SRV resource records
The IP address to the software server
In the DNS SRV resource records, the following data has to be set to find
the IP address to the SW-server:
Service
_aas442x_cfg._tcp (applications up to and including R7K)
_aasdbc_cfg._tcp (applications from R7M and later)
Protocol
_tcp
Prio
The priority of the target host. The phone will try to contact the
target host with the lowest-numbered priority. Target hosts with the
same priority should be tried in pseudo random order. The range is
0-65535.
Weight
A load balancing mechanism. When selecting a target host among
those that have the same priority, the chance of trying this one first
is proportional to its weight. The range is 1-65535. Domain admin-
istrators shall use Weight = 0 when there is not any load balancing
to do.
Port
80 (fixed value)
Host
The DNS name of the Software server
