Buttons Not Working Randomly

[AtariFX]

So here is what happens:

https://youtu.be/DvcHSYkezV4

Phones are 9608
They are H.323

Firmware is 6.6604

IP Office Server is on Prem (IP Office R10.1.0.3). This happens to about 4-5 phones per day. Usually, 3-4 reboots fix the issue. Shortcodes work fine. Total of 300 phones. Really random and Avaya is no help and "never seen this before".

 

[janni78]

What kinda network do you have?
Assuming IPO and phones are on different subnet?
ALG on firewall/router?

Have you tried if it happens connecting a phone on the same subnet as IPO?

"Trying is the first step to failure..." - Homer

 

[AtariFX]

Assuming IPO and phones are on different subnet?

No they are on the same subnet, they're on the same (but seperate) LAN inside. No firewall inside.

 

[janni78]

This is getting off to a bad start.

Same LAN is not the same thing, if you have 300 phones they would not fit on a standard /24 network, so either you have several subnets or one with more than 255 address.

If they are not on the same subnet then a router is involved, what unit (brand/model) is handling the routing?

"Trying is the first step to failure..." - Homer

 

[AtariFX]

They are on the same subnet.

10.80.0.0 /22

Gateway internally for these devices is a Cisco catalyst layer 3 switch.

IP Office is 10.80.0.5
DHCP Range for the phones starts at 10.80.0.100-10.80.2.254

POE is fine, no power issues.

 

[janni78]

So there are no clients on this network just phones?
What is giving the DHCP?

That issue are usually caused by network issues.

"Trying is the first step to failure..." - Homer

 

[AtariFX]

Correct. Just phones. The IP OFfice is issuing DHCP.

"that issue are usually caused" - I can't seem to find any other cases of this issue online. Do you know of any other threads I could reference?

 

[qtelcom]

Since your on R10.1, you could try firmware 6.6506 on those 9608's

 

[intrigrant]

The phones communicate with IPO using UDP port 1720, it looks these are blocked periodically. Run monitor and select H.323 to observe. A wireshark trace on a mirrored port of a not working IP set may be needed as well.
I have seen funny things happen on Cisco switches in combination with non-Cisco phones.

 

[Okkie26]

I would say that, since shortcodes are working, that port 1720 is running fine, and the communication between IP phones and IPO is working.

What does sys monitor say?

 

[AtariFX]

The phones communicate with IPO using UDP port 1720, it looks these are blocked periodically. Run monitor and select H.323 to observe. A wireshark trace on a mirrored port of a not working IP set may be needed as well.
I have seen funny things happen on Cisco switches in combination with non-Cisco phones.

I do want to say that I've sent wireshark logs to Avaya on this and they don't see anything unusual.

 

[Okkie26]

Then why do shortcodes work of port 1720 is blocked?

 

[AtariFX]

Sorry - I was quoting the person above.

 

[tlpeter]

hortcodes do not use port 1720 but signaling does.
He can dial numbers so he can dial shortcodes as well.


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