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Getting Started
31
The following table lists common DHCP options supported by Skype for Business 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
Information
43 (vendor class ID:
CPE-OCPHONE)
Specify virtual local area network (VLAN) ID.
43 (vendor class ID:
MS-UC-Client)
Specify Skype for Business Server pool
certificate provisioning service URL.
Vendor Class
Identifier
60
Identify the vendor type.
TFTP Server
Name
66
Identify a TFTP server when the 'sname' field in
the DHCP header has been used for DHCP
options.
Boot file Name
67
Identify a boot file when the 'file' field in the
DHCP header has been used for DHCP options.
Skype for
Business Server
120
Specify a list of Skype for Business Servers
available to the client.
For more information on DHCP options, refer to
Summary of Contents for T46G Skype For Business Edition
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