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Block unauthorized sip invite requests – AltiGen MAXCS 7.0 Update 1 New Features Guide User Manual

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MaxCS 7.0 Update 1 New Features Guide

Page 18 of 26

To easily move address between the lists, two buttons have been added. You can now move a SIP Device IP

address from one list directly to the other, instead of removing it from one, then adding it to the other in a

separate step.

Figure 16: Move Device IP address from one list to the other

Block Unauthorized SIP Invite Requests

MaxCS 7.0 Update 1 includes a filter to block unauthorized SIP Invite requests. When the MaxCS server receives an

SIP Invite request, if the IP address or the caller source is NOT in one of the following lists, the call will be ignored

(dropped):

IP address is in the MaxCS registered IP extension list

IP address is in the configured SIP Trunk list

IP address is in the IP dialing table list

IP address is in the SIP Allow IP list

The caller is from another AltiGen system

The caller is from an AltiGen IP phone

The filter is disabled by default. To enable the filter, add the following registry entry and press VM&SP Log Dump

under the Diagnostics > Trace menu (or just restart the system).
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AltiGen Communications,

Inc.\AltiWare\Service Providers\SIPSP
"BlockSIPUnauthorizedCall"=dword:00000001