| Phone Network | 18
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 RFC 3925. If a single alternate DHCP server
responds, this is functionally equivalent to the scenario where the primary DHCP server responds with a valid
provisioning server address. If no DHCP server responds, the INFORM query process will retry and until the
time is out.
DHCP Option 42 and Option 2
Yealink Teams IP Phones can use 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).
Related information
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 predefined
hostname to the DHCP registration server. The name may or may not be qualified with the local domain name (based
on RFC 2132). See RFC 1035 for character restrictions.
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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
[1]
<y0000000000xx>.cfg
Description It configures the DHCP Option 12 Hostname on the phone.
Permitted Values String within 99 characters
Default For T58A Teams IP Phones: SIP-T58
For T56A Teams IP Phones: SIP-T56A
For CP960 Teams IP Phones: SIP-CP960
For T55A Teams IP Phones: SIP-T55A
For VP59 Teams IP Phones: VP59
[1]If you change this parameter, the phone will reboot to make the change take effect.
DHCP Option 60
DHCP option 60 is used to identify the vendor and functionality of a DHCP client. You can set the format for option
60. The default vendor class ID is “yealink”.
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DHCP Option 60 Configuration
DHCP Option 60 Configuration
The following table lists the parameter you can use to configure DHCP option 60.
Parameter static.auto_provision.dhcp_option.option60_value
[1]
<y0000000000xx>.cfg
Description
It configures the value (vendor name of the device) of DHCP option 60.
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