oxo restarting

[clyde_1807]

Hello,

I have a problem with a system ( R 2.10) with CPU 2-e. The system has 3 PRA accesses (2 for PSTN and 1 for Cisco Router). Sudenlly the system is restarting even during work program. In hystory and anomalies I saw this : event 53 problem on PRA access. This problem apears after I installed the 3`rd PRA (the 2`nd for PSTN - the same PSTN provider). Do you have any idea what cause this problems?

[vad]

Check synchronization priority. PTT access must be with more priority.

[clyde_1807]

Now the priorities are:
1 - first PSTN PRI access
15 - cisco router
20 - second PSTN PRI access.

Should I change the order?( cisco router to the third positon)