Administrator’s Guide for W60P/W53P/W41P DECT Phones
106
Description
It enables or disables the IP phone to retry to re-subscribe after registering to the secondary server with
different IP addresses when encountering a failover.
Note
: It works only if "account.X.sip_server.Y.failback_mode" is set to 1, 2 or 3.
Permitted
Values
0
-Disabled
1
-Enabled, the IP phone will immediately re-subscribe to the secondary server, for ensuring the normal
use of the features associated with the subscription (for example, BLF, SCA).
Default
0
Parameter
account.X.outbound_proxy.Y.register_on_enable
[1]
[2]
<MAC>.cfg
Description
It enables or disables the IP phone to register to the secondary outbound proxy server before sending
requests to it when encountering a failover.
Permitted
Values
0
-Disabled, the IP phone will not attempt to register to the secondary outbound proxy server, since the
phone assumes that the primary and secondary outbound proxy servers share registration information. So
the IP phone will directly send the requests to the secondary outbound proxy server.
1
-Enabled, the IP phone will register to the secondary outbound proxy server first, and then send the
requests to it.
Default
-1
, the IP phone will invoke “account.X.sip_server.Y.register_on_enable” to take effect.
[1]
X is the account ID. X=1-8.
[2]
Y is the server ID. Y=1-2.
SIP Server Name Resolution
If a domain name is configured for a server, the IP address(es) associated with that domain name will be resolved
through DNS as specified by
. The DNS query involves NAPTR, SRV and A queries, which allows the IP phone
to adapt to various deployment environments. The IP phone performs NAPTR query for the NAPTR pointer and trans-
port protocol (UDP, TCP and TLS), the SRV query on the record returned from the NAPTR for the target domain name
and the port number, and the A query for the IP addresses.
If an explicit port (except 0) is specified, A query will be performed only. If a server port is set to 0 and the transport
type is set to DNS-NAPTR, NAPTR and SRV queries will be tried before falling to A query. If no port is found through
the DNS query, 5060 will be used.
Topic
SIP Server Name Resolution Configuration
SIP Server Name Resolution Configuration
The following table lists the parameters you can use to configure SIP server name resolution.
Parameter
account.X.sip_server.Y.transport_type
[1][2]
<MAC>.cfg
Description
It configures the type of transport protocol.
Permitted
Values
0
-UDP
1
-TCP
2
-TLS
3
-DNS-NAPTR, if no server port is given, the IP phone performs the DNS NAPTR and SRV queries for the
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