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 (Default: unchecked)
 Tells Media Server instance not to send display UPDATEs to the leg of the call.

Shared Line Appearance

SLA does not work with Yealink phones.

TLS Not Functioning

TLS does not work with Yealink phones in 14.10.  See 

Seehttp://track.sipfoundry.org/browse/XX-11352

SRTP Settings

To enable SRTP for a Yealink phone go to Device->Phones->"Yealink phone"->Lines->Advanced-> and look for SRTP encryption enable .

Issue : this field lets you insert values such as 0,1,2 but you wouldn't know which value corresponds to what
Description says : Enable/Disable Voice Encryption(SRTP - which is not exactly correct because if you go over to the Yealink phone via its web UI you would have 3 options : Disabled/Optional/Compulsory - according to the Yealink plugin from admin portal these values correspond to 0,1,2 but the user wouldn't know that.  See 

Seehttp://track.sipfoundry.org/browse/XX-11353

G.711 Codec Confusion

Under Device->Phones->"Yealink phone"->Line->Codecs there is no way of telling which codec is G711 U-law and which is A-law since both are named G711.

Workaround: Select both.

See: http://track.sipfoundry.org/browse/XX-11355