IP phone switch settings

[Axemanmisl]

Hello all,

I have an IPoffice install with around 25 or so IP phones in two buldings. I have the two buildings linked through fibre between two D-link switches.

I have a problem where I occasionally get calls that only have one-way communication, or calls get dropped. This happens to internal and outside calls. The installer advised me to set all my switches' ports to "100M Half-Duplex" . Has anyone else been told this? did it fix your problems? I find it hard to believe that it's the cause of these problems.

I have noticed however that the phones seem to connect both using half and full duplex seemingly randomly.

Any suggestions??!?! Thanks!

Phil

 

[itpphoneguy]

Hi Phil,
Look at the network load between the two buidings. You may need a "layer 3 switch" at each end to allow ip packets to have priority.

 

[Axemanmisl]

Thanks for your input.

My switch reports that there is very little load (1-2%) on the 1000base-T fibre connection between the buildings.. even with calls and file transfers taking place. My switches support 802.1Q QOS, but I don't have it configured since the installer wasn't familiar with configuring QOS for use with the IP phones.

Do you think other network traffic is responsible for the one-way calls? I would think it would just result in poor quality.

 

[IPGuru]

What model of IP hard phone & what ip hardphone firmware revision are you using?

 

[Axemanmisl]

I'm using the 4602SW phones mostly, with a few six button IP sets. How do I find out the firmware revision? Thanks!

 

[IPGuru]

We Have a problem with a sight getting OWT with the ip4602 handest running firmware 1.8 (as supplied on the 2.0 admin cd) this is under investigation by avaya as they have a number of issues.

 

[Axemanmisl]

The installers put on rev. 2.0... so I'm guessing that the 4602 phones are probably rev 1.8 as well. How common is the problem with your site?