Re: 3.2.2c echo

glen.johnson · ‎09-19-2002

Anyone else noticed IP Phone to IP Phone echo increasing on the same switch/lan?

Complaints are way up in the 3 days 3.2.2c spE has been installed.

Current phone load is 303020204.

Anything new to test of tell them to just live with it.

jpstott · ‎09-19-2002

What phone load were you on before? I doubt that the service pack caused an increase in echo, since phones do not touch the call manager once they are connected. Phone firmware, on the other hand, could potentially cause a problem. You could experiment and go back to 303020100 on a few phones.

In general, echo should never exist on the LAN. How is your LAN configured? (VLANs, trunks, etc) What equipment do you use? Any other information that may be relevant?

glen.johnson · ‎09-19-2002

Previous phone load was 3030ESP0. BTW, all phones are 7940.

LAN is Cat 6506 with gig ports out to 3524xl.

gig ports are ISL

Servers are on Cat 6506 100 mbit card.

Phone traffic in on vlan2.

Data on vlan1.

QOS config on Cat is

wred 2q2t tx 2 1 cos 3

wred 1p2q2t tx queue 1 40:80 70:100

wred 1p2q2t tx queue 2 40:80 70:100

Phones are on dot1q trunks

priority extend cos 0

jpstott · ‎09-19-2002

Everything looks fine from what you have described. I have noticed phone call quality issues with the volume on the phones turned all the way up. Also with users that have headsets.

Have you experienced echo with phones on the same switch? Test from 6500 port to 6500 port, also 3500 port to 3500 port. Does the problem go away after hours (during low data utilization)?

You've got a tough one here....

tringwelski_2 · ‎09-19-2002

I would suggest going to 303020209 load you can d/l from cco.

jpstott · ‎09-19-2002

Glen,

You do have the latest firmware already with service pack E. It is 3.2.4, which is the latest posted firmware on CCO. I believe that 303020209 in a misprint in the readme file:

"Version and description:

The install program file name is cmterm-7940-7960.P003-3-2-4.exe and the firmware version within the install program is P00303020209."

You will see when you install it that it is still the same 3.2.4 version you got with service pack E.

trailman73 · ‎09-20-2002

Glen,

I am having the same issue. Did this, "The install program file name is cmterm-7940-7960.P003-3-2-4.exe and the firmware version within the install program is P00303020209", fix your problem?

Geoff

glen.johnson · ‎09-22-2002

I downloaded the new phone load and it did update the phone load to 09. I've put that load on a few test phones but had to be out of the office for a few days so I'll put it on all the phones when I'm back on Monday.

BTW, No one has head sets and I have noticed echo on calls from 6506 to 6506 port and also 3500 to 3500 port. All on same switch. I've tried the volume below 75% and it does help but as some people have to have the volume turned up to hear, it's not a usable solution.

glen.johnson · ‎10-04-2002

The 09 load seems to have fixed the problem.

Thanks to all that responded.

r-reed · ‎10-04-2002

I have a client with a hearing problem and everyone calling him complained of echo. The fix was the 209 load. The problem is feedback from the handset speaker to the mike. The 209 load has an echo canceller coded in to solve the problem.