Before adding devices supporting ISUP 2.6/4.0 protocol to the system, you need to set related configuration to allow these devices to access the system.
Click System > Network > Device Access Protocol to enter the Device Access Protocol page.
Check Allow ISUP of Earlier Version.
The device may be attacked when accessing the system by ISUP of earlier versions.
Before adding devices supporting ISUP 2.6/4.0 protocol to the system, you need to set related configuration to allow these devices to access the system.
Click System > Network > Device Access Protocol to enter the Device Access Protocol page.
Check Allow ISUP of Earlier Version.
The device may be attacked when accessing the system by ISUP of earlier versions.