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UC-P100-S/UC-P110-S Phones for Skype for Business
Supplemental Guide – DOC. 8412A
Tap 2. IPv4.
Tap the value in the 2. Static DNS field, and then select Enabled from the drop-
down list.
Enter the DNS server addresses in the Pri. DNS and Sec. DNS fields.
Tap Save.
DHCP Option
DHCP provides a framework for passing information to TCP/IP network devices.
Network and other control information are carried in tagged data items that are stored
in the options field of the DHCP message. The data items themselves are also called
options.
DHCP can be initiated by simply connecting the phone with the network. Skype for
Business phones broadcast DISCOVER messages to request the network information
carried in DHCP options, and the DHCP server responds with specific values in
corresponding options.
The following table lists common DHCP options supported by phones.
Parameter
DHCP Option
Description
Subnet Mask
1
Specify the client’s subnet mask.
Time Offset
2
Specify the offset of the client's subnet in seconds from
Coordinated Universal Time (UTC).
Router
3
Specify a list of IP addresses for routers on the client’s subnet.
Time Server
4
Specify a list of time servers available to the client.
Domain Name
Server
6
Specify a list of domain name servers available to the client.
Log Server
7
Specify a list of MIT-LCS UDP servers available to the client.
Host Name
12
Specify the name of the client.
Domain Server
15
Specify the domain name that client should use when
resolving hostnames via DNS.
Broadcast
Address
28
Specify the broadcast address in use on the client's subnet.
Network Time
Protocol Servers
42
Specify a list of NTP servers available to the client by IP
address.
Vendor-Specific
43 (vendor class ID:CPE-
OCPHONE)
Specify virtual local area network (VLAN) ID.
Information
43 (vendor class ID: MS-
UC-Client)
Specify Skype for Business Server pool certificate provisioning
service URL.