Phone lines cut out randomly 2

[Quadnet]

After it drops, we restart the switch and it works until the next drop (about 2 times a day)
We've checked with BT and it seems is an internal problem.

Our system:
Phone switch: Avaya IP403 at software level 3.0(578);
IP Office manager 5.2(55)

We believe the problem is software related
Are they any known bugs/incompatibilities between these two versions?
What is the highest version for the switch we can install? and which version of IP office would correspond to it?

This is now becoming an urgent issue.

 

[Quadnet]

So far, a good full day has gone by and we havn't had any line drops yet.
Crossed fingers

 

[Quadnet]

I was going to close the thread, no problems with the phone since last wednesday evening when I re-sync the system together with the BT's system.

Now, on Saturday there was a power cut (again) and although some servers are not working, the phone switch seem to be OK but today (10.42am) teh line dropped again.

It may be a one-off,

I'll keep updating

 

[aarenot]

UPS

 

[Quadnet]

It was a one-off.
The phone system has not dropped again

Thanks everybody for your help