KB003
Creating Option 156 in Your Windows DHCP Server
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Open the DHCP tool in Windows: Start > Administrative Tools > DHCP
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Click the “+” sign next to the first DHCP server in the left-most pane to expand the options. Right-click IPv4 and select Set Predefined Options.
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Click Add. In the Name field, type ShoreTel (or whatever you want to name the option).
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Set the Data type to String.
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Under Code, type 156 and add a description if desired.
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Click OK twice.
Adding Option 156 to Your Windows DHCP Server’s DHCP Scope
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Click the “+” sign next to IPv4, then click on your scope for the network you need to add "option 156" to. (usually for voice Vlan, IE 254)
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Right-click Scope Options and select Configure Options in the "Contents of Scope" window.
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On the General tab, scroll down to option 156 and check the box next to it to enable it.
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Under the String Value, enter any/all of the following options:
vlan= # of your voice vlan
layer2tagging=1
configservers=IP of director/connect
ftpservers=IP of director/connect
There needs to be a space after the comma when adding string values.
Here is an example:
"vlan=254, layer2tagging=1, configservers=192.168.0.10, ftpservers=192.168.0.10"
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Click OK.
Checking to See If Your Phone is Set Up Via DHCP or Manually
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Type mute -> info (4636) -> # -> Services -> and select Details when the Config server is highlighted
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If manually configured, you will see “Config servers set from manual entry”
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To set it to learn dynamically via DHCP, click Edit in the Service window while the Config Server is highlighted, and enter 1234 as the Admin password.
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Press OK.
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Press the Clear button.
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Press Back.
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Press Back.
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Press Apply.
Note: If there are residual or old settings that are not clearing after deleting the hard coded Config Server (or if all else fails), enter the following on your phone: Mute ->25327# -> then select the Clear.
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