how to reject INVITE from unknown sources

[tnorris3cxUser]

(11-11-2013 05:22 PM)Yealink Support Wrote:  Hi all,
Do you mean you just want the phone to accept the message only from PBX?
If you are using our latest T2X V71 firmware or V70 firmware, please use below auto provisioning parameter to enable this feature.
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#!version:1.0.0.1
account.1.sip_trust_ctrl = 1
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#account.1 means that it takes effect in account 1.
If you are using V61 or V60 firmware, please use this parameter:
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[ account ]
path = /config/voip/sipAccount0.cfg
SIPTrustCtrl = 1
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Hi, I've been having problems with phantom calls too. I got with our vendor and he suggested this setting and a couple others. This does not work. I'm using this firmware 28.71.0.176 and I can still make my phone ring from sources other than our PBX.

Vendor is also suggesting a different brand phone that does have working trust settings, but I'd really prefer to have the Yealink T46 working.