NEC SV 8100 IP phones

[Jackcmann]

Hello

I have a SV 8100 installed with 94 IP phones.
Every couple of weeks, when a call comes in to the operator and the operator then tranfers to the revelant extension. The call then goes to a different extension. Once we reboot the SV 8100 and the switches, this problem then goes away.
What could be the cause of this and how to rectify the problem.

Thank you

 

[OzzieGeorge]

Have you considered the possibility that a call forward has been set?