Yealink SIP-T4X Administration Manual page 358

Parameter-
account.X.transport
Description
Format
Default Value
Range
Example
Parameter-
account.X.naptr_build
Description
Format
Default Value
Range
Example
Configuration File
<MAC>.cfg
Configures the transport type for account X.
If it is set to 3 (DNS-NAPTR) and no server
port is given, the IP phone will perform the
DNS NAPTR and SRV queries for the
transport protocol, port and IP address.
X ranges from 1 to 6.
Integer
0
Valid values are:
0-UDP
1-TCP
2-TLS
3-DNS-NAPTR
account.1.transport = 0
Configuration File
<MAC>.cfg
Configures the transport protocol the
phone constructs the SRV query for when
no NAPTR records are returned.
X ranges from 1 to 6.
Integer
0
Valid values are:
0-UDP
1-Multiple Types
account.1.naptr_build = 0
Appendix
343