topic Re: Problem with wireless phones CP 7921-G in Wireless

Problem with wireless phones CP 7921-G

Adrian Leon — Sun, 04 Jul 2021 06:44:22 GMT

Hi good day sorry.

I'm new to this, but it's a start.

I have a question for you. I am working as a network administrator IP phone, the company made a firmware upgrade to CUCM version 8.5, the following versions was that wireless phones CP 7921-G are also updated the firmware to function better with CUCM 8.5, but since this happened,

maybe you hear better than previous versions,

but there is a lot of packet loss, the comuniacion not understood, users complain too much about the wireless phone system.

We could help with any suggestions on how to improve service.

Thanks for your attention

Problem with wireless phones CP 7921-G

Stephen Rodriguez — Fri, 15 Mar 2013 16:44:37 GMT

What version did the phones get upgraded too?

Hopefully they are on 1.4(4)

HTH,
Steve

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Problem with wireless phones CP 7921-G

migilles — Fri, 15 Mar 2013 16:47:44 GMT

Need to ensure the 792x phones are running 1.4(3) or later if connecdting to a 11n AP.

1.4(4) is recommended as Steve mentioned.

Re: Problem with wireless phones CP 7921-G

George Stefanick — Fri, 15 Mar 2013 16:48:22 GMT

The first thing I would do is make sure your wireless network is designed to support voice. If it is not then we need to fix that first.

If it is designed properly then we need to look at code revs used on the wifi side and the phone side . If that checks out ..

I would then look at client debugs

Sent from Cisco Technical Support iPhone App

Re: Problem with wireless phones CP 7921-G

Adrian Leon — Fri, 15 Mar 2013 17:11:46 GMT

These system Information.

Entire network CAT 6

25 unit CP 7921-G System Load ID CP7921G-1.4.2.LOADS

25 unit Air-lap1121g-a-k9 IOS Version 12.3(11)JA3

Cisco 4400 series Wireless LAN Controler Model 4402 Version 4.0.217.0

Cisco Unified CM Administration System version: 8.5.1.10000-26

Re: Problem with wireless phones CP 7921-G

George Stefanick — Fri, 15 Mar 2013 17:36:18 GMT

4.0.217.0 code? My freind this code is so old that its not supported, at last check. If you called TAC, I bet they would recommend you upgrade. This is YEARS old.

I would look at getting that code upgrade first. Just my 2 cents

__________________________________________________________________________________________
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
__________________________________________________________________________________________
‎"I'm in a serious relationship with my Wi-Fi. You could say we have a connection."

Re: Problem with wireless phones CP 7921-G

migilles — Fri, 15 Mar 2013 17:43:15 GMT

Yeah 4.0 is not a supported verison any longer.

Should at least be a minimum of 6.0.202.0 or 7.0.235.0, but the AP1120, which is 802.11b/g only, may not be supported in some of those later releases.

1.4(2) should work ok with the 1121 though.

But the WLC version is definitely in question.

Below is my 7921G Deployment Guide, which lists supported versions, APS, and other info.

http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7921g/6_0/english/deployment/guide/7921dply.pdf

Re: Problem with wireless phones CP 7921-G

George Stefanick — Fri, 15 Mar 2013 17:46:53 GMT

i recall the 1120 is support past 4.0 code so long as it has a g radio. b only radios will not work. but you cant go back 7.0 code as these aps dont have enough memory.

Re: Problem with wireless phones CP 7921-G

Adrian Leon — Fri, 15 Mar 2013 17:49:36 GMT

I wonder, what are the latest versions for WLC,

and which version is the one that will work best system?

where I can find a little more information

Thanks for your attention George

regards

Re: Problem with wireless phones CP 7921-G

migilles — Fri, 15 Mar 2013 17:51:59 GMT

See the guide that I posted a link to.

We currently recommend 7.2.110.0, 7.3.101.0 or 7.4.100.0.

http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7921g/6_0/english/deployment/guide/7921dply.pdf

Re: Problem with wireless phones CP 7921-G

Adrian Leon — Fri, 15 Mar 2013 18:31:23 GMT

Thank you for your advice, I need more information to upgrade WLC which could advance without changing the AP

Re: Problem with wireless phones CP 7921-G

George Stefanick — Fri, 15 Mar 2013 18:49:21 GMT

Take a peek at this link it shows code and aps supported

http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn7_0_116_0.html#wp610751

This is up to 7.0.116.0 .. But this would be for all 7.0 code .. Your controller (4400) doesnt support ANY code past 7.0 code. You cant go to beyond 7.0 code ..

Re: Problem with wireless phones CP 7921-G

migilles — Fri, 15 Mar 2013 18:57:40 GMT

Please DO NOT us 7.0.116.0.
Use 7.0.235.0 or later instead.

Sent from Cisco Technical Support iPhone App

Re: Problem with wireless phones CP 7921-G

George Stefanick — Fri, 15 Mar 2013 19:10:53 GMT

Yup .. I only had the 7.0.116.0 link handy 😉

What about the lastest 7.0.24x ?

Sent from Cisco Technical Support iPhone App

Re: Problem with wireless phones CP 7921-G

Adrian Leon — Fri, 15 Mar 2013 22:00:31 GMT

then my controller, if you accept the version 7.0.235.0?

Re: Problem with wireless phones CP 7921-G

George Stefanick — Sat, 16 Mar 2013 18:11:09 GMT

yes your controller will support 7.0.235.0