Dhcp Option 66, Option 43 And Custom Option; Dhcp Option 12; Dhcp Option 12 Hostname Configuration - Yealink SIP-T3 Administrator's Manual

DHCP Option 66, Option 43 and Custom Option

During the startup, the phone automatically detects the DHCP option for obtaining the provisioning server address.
The priority is as follows: custom option > option 66 (identify the TFTP server) > option 43.
The phone can obtain the Auto Configuration Server (ACS) address by detecting option 43 during startup.
Note : If you fail to configure the DHCP options for discovering the provisioning server on the DHCP server, enable the phone
to automatically discover the provisioning server address. One possibility is that connecting to the secondary DHCP server
that responds to DHCP INFORM queries with a requested provisioning server address. For more information, refer to
3925 .
Related Topic
DHCP Provision Configuration
DHCP Option 42, Option 2 and Option 100
Yealink phones support using the NTP server address offered by DHCP.
DHCP option 42 is used to specify a list of NTP servers available to the client by IP address. NTP servers should be
listed in order of preference.
DHCP option 2 is used to specify the offset of the client's subnet in seconds from Coordinated Universal Time
(UTC).
DHCP option 100 is used to specify the timezone information (time zone and daylight-saving offset). The priority is
as follows: option 100 > option 2.
Related Topic
NTP Settings

DHCP Option 12

You can specify a hostname for the phone when using DHCP. The DHCP client uses option 12 to send a pre-
defined hostname to the DHCP registration server.
See RFC 1035 for character set restrictions.
Topic

DHCP Option 12 Hostname Configuration

DHCP Option 12 Hostname Configuration
The following table lists the parameter you can use to configure DHCP option 12 hostname.
Parameter static.network.dhcp_host_name
Description It specifies a hostname for the phone when using DHCP.
Permitted
String within 99 characters
Values
For T57W phones: SIP-T57W
For T54W phones: SIP-T54W
For T53W phones: SIP-T53W
Default For T53 phones: SIP-T53
For T53C phones: SIP-T53C
For T48U phones: SIP-T48U
For T48G phones: SIP-T48G
Network Configurations
<y0000000000xx>.cfg
RFC
34