Occasionally one-way audio with IP trunk between two nodes

[jpissot]

My customer has 2 nodes with OXE R10 J1.401.40.C (crystral with CPU6)

There is an IP Trunk between the 2 nodes.

Occasionally (approximately once a week) , the customer has problem with the internal calls between the 2 nodes:
During a communication, there are "whites", "one-way audio".

To solve the problem, we restart the INTIP2 of the node 1 and the INTIP3 of the node 2.
Sometimes, the reboot of one card suffices, sometiwes we must reboot the2 cards.

I have already changed the INTIP cards. We have check the WAN link when the problem occurs: it's correct.

A ticket is created on Service Support Alcatel, they are always trying to analyses tcpdump, mtracer traces, ...

Thanks for your help.

[krzysioD]

Run "voip assessment tool" so-called "the Aviso tool" it's basically a call steering application, could run on old laptop.
You take two or more phones or 4068 softphones and run test for 7 days a 24 hours, then you will see full info.

Also - what does the ip tickets say, when during this - it's one card failure (so you see IP of this card)? any incident in logs?
check - calls with the lowest MOS.

[jpissot]

When you write "two or more phones ", UA phones are possible? because there are no ipphone on the tow nodes.

Thanks

[jpissot]

IF the synchro is bad on the T2/E1 (T2 operator) of one node, this may explain the one way audio intermittenly?

The fault disepears with the reset of the two intip.

Thanks

[krzysioD]

Nope - digital (TDM) sync - could explain some dect related issues, or modem/fax, but no itip comm.
At least - one two ipphones could rule out the network issues. Also what does ipticket say?
Any chance on ip assessment check ? (the AVISO tool) just to be sure that - there is no network issue?
Most sites with R10 run CPU7 or appliance or CPU-2 so i'm just curious if it's not related to some traffic peek, and CPU6 not handling the calls?
Any way - if it's the lattest patch - must wait for ALU to respond with some bugfix.