Yealink SIP-T48G Administrator's Manual page 412

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
Details of Configuration Parameters:
account.X.sip_server.Y.transport_type
(X ranges from 1 to 16, Y ranges from 1 to 2)
Description:
Configures the type of transport protocol for account X.
0-UDP
1-TCP
2-TLS
3-DNS-NAPTR
If the parameter is set to 3 (DNS-NAPTR) and no server port is given, the IP phone
performs the DNS NAPTR and SRV queries for the service type and port.
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G).
X ranges from 1 to 12 (for SIP-T42G).
X ranges from 1 to 6 (for SIP-T41P/T27P).
X ranges from 1 to 3 (for SIP-T23P/G).
X ranges from 1 to 2 (for SIP-T21(P) E2).
Web User Interface:
Account->Register->SIP Server 1/2->Transport
Phone User Interface:
None
account.X.naptr_build
Description:
Configures the way of SRV query for the IP phone to be performed when no result is
returned from NAPTR query for account X.
0-SRV query using UDP only
1-SRV query using UDP, TCP and TLS
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G).
X ranges from 1 to 12 (for SIP-T42G).
X ranges from 1 to 6 (for SIP-T41P/T27P).
X ranges from 1 to 3 (for SIP-T23P/G).
X ranges from 1 to 2 (for SIP-T21(P) E2).
Web User Interface:
None
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Parameters Permitted Values
0, 1, 2 or 3
0 or 1
Default
0
0