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UC-P100-S/UC-P110-S Phones for Skype for Business
Supplemental Guide – DOC. 8412A
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Early Media
Early media refers to media (e.g., audio and video) played to the caller before a SIP call is
actually established.
Current implementation supports early media through the 183 message. When the caller
receives a 183 message with SDP before the call is established, a media channel is
established. This channel is used to provide the early media stream for the caller.
180 Ring Workaround
180 ring workaround defines whether to deal with the 180 message received after the
183 message. When the caller receives a 183 message, it suppresses any local ringback
tone and begins to play the media received. 180 ring workaround allows the phone to
resume and play the local ringback tone upon a subsequent 180 message received.
180 ring workaround can be configured using the configuration files or locally.
Configuration Methods
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure 180 ring workaround.
Parameter:
phone_setting.is_deal180
Local
Web User Interface
Configure 180 ring workaround.
Navigate to:
http://<phoneIPAddress>/servlet?p=featu
res-general&q=load
Details of the Configuration Parameter
Parameter
Permitted Values
Default
phone_setting.is_deal180
0 or 1
0
Description:
Enables or disables the phone to deal with the 180 SIP message received after the 183 SIP
message.
0-
Disabled
1-
Enabled, the phone will resume and play the local ringback tone upon a subsequent 180
message received.
Web User Interface:
Features > General Information > 180 Ring Workaround
Phone User Interface:
None