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Hi Friends, when is Voice Privacy Mask generated and how is it generated? swathi 20-May-2008 09:51:37 PMComments Its before setting up the traffic channel. Posted by HamidAliKhan www.freesoft411.com/freeware/mask.html Posted by crouse Before setting up the traffic channel. Posted by waqqas1 1.)VP mask is used by MS and BS to encrypt user information sent over the digital traffic channel during call 2.0VP mask is generated at the beginning of the call 3.0VP is only possible if the global challenge operation is successful 4.0MS may request VP at call setup or during the call 5.)VP is a subscriber feature that can be enabled and disabled using IS-95 signaling. Posted by sagitraz Voice privacy can be activated before setting up the traffic channel and also once the traffic chanel is already established.Once it is activated after having proper negotiation with the Base station the mobile will transition to Private long code mask instead of using Public long code mask.It is generated with the algorithm called Key_VPM_Generation procedure where the 2 most significant bits that is M40 & M41 are set to 01 and Bits M39 through M0 shall be the 40 least significant bits of the Voice Privacy Mask (VPM) generated by the Key_VPM_Generation procedure.Hope it clarifies. Posted by elexdeepak1 |
Posted: 21-May-2008 05:44:05 AM By: elexdeepak1 Voice privacy can be activated before setting up the traffic channel and also once the traffic chanel is already established.Once it is activated after having proper negotiation with the Base station the mobile will transition to Private long code mask instead of using Public long code mask.It is generated with the algorithm called Key_VPM_Generation procedure where the 2 most significant bits that is M40 & M41 are set to 01 and Bits M39 through M0 shall be the 40 least significant bits of the Voice Privacy Mask (VPM) generated by the Key_VPM_Generation procedure.Hope it clarifies. | |
Posted: 21-May-2008 09:48:24 AM By: sagitraz 1.)VP mask is used by MS and BS to encrypt user information sent over the digital traffic channel during call 2.0VP mask is generated at the beginning of the call 3.0VP is only possible if the global challenge operation is successful 4.0MS may request VP at call setup or during the call 5.)VP is a subscriber feature that can be enabled and disabled using IS-95 signaling. | |
Posted: 30-December-2008 02:40:12 PM By: waqqas1 Before setting up the traffic channel. | |
Posted: 07-April-2009 05:39:11 AM By: crouse www.freesoft411.com/freeware/mask.html | |
Posted: 24-April-2009 12:41:46 AM By: HamidAliKhan Its before setting up the traffic channel. |