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This test is used to check timing because the timing must be very accurate in order for zaptel hardware to work correctly. To run the 'zttest':
1. Login to the system using SSH protocol
2. Navigate to: 'cd /home/servers/pbxware/build/zaptel-1.0.9.1' 3. Run the './zttest' command
You will see something like this: Opened pseudo zap interface, measuring accuracy... 100.000000% 99.976379% 100.000000% 100.000000% 100.000000% 100.000000% ... Accuracy will be measured until 'CTRL + C' is pressed.
IMPORTANT: By deploying zttest, you can check if there are any IRQ missing. Digium cards will function properly as long as the back report is not less then 99.98%. In order to increase performance, make sure your card is not sharing an IRQ on your system. You may need to disable unnecessary hardware on your machine such as sound controllers, USB controllers, extra ethernet controllers, firewire, parallel ports, and/or serial ports. You should try moving and swapping the Digium card to different PCI slots in order to get it on it's own IRQ.
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