Let I rewrite the problem.
first PABX can be call to second PABX,but second cannot call to first PABX.
Sometime only for this failure.
I am not sure for interface card. Now I have not the interface card for experiment.
I am not for how to work of PABX. I just use it.
I saw the LAN 2 wires ...
We have NEC NEAX 2000IPS 2 units, both 2 units are connected with LAN system.
First unit are is normal.
Second unit is abnormal.
Second unit [highlight #EF2929]could not[/highlight] calling to first unit, but it [highlight #4E9A06]could be[/highlight] received from frist unit.
This problem is...
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