Author Topic: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones  (Read 4276 times)

Offline maximumboost

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Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« on: October 10, 2018, 09:53:11 AM »
We have 4 x Mitel 5624 Wi-Fi phones we're trialling at a customers site.
The site uses a D-Link DWC-2000 wireless controller + 149 D-Link DWL-8610AP access points.
Our problem is that we can't get the phones to seamlessly / fast roam between access points.
We removed all security from the voice SSID thinking security was the issue but that made no difference to the roaming performance.
We've tested every recommended wireless controller / WAP setting from multiple configuration guides for Aruba, Cisco, etc. but nothing has worked thus far.
The phone can take anywhere from 1 minute - 5 minutes to roam to a WAP outputting a better signal.
You can be standing directly in front of a WAP outputting a -30dbm signal and the phone will remain connected to a WAP outputting -80dbm.
Phones are running the latest firmware version 6.0.7

From our perspective it seems like the roaming algorithm in the phone is broken.
Anyone have any suggestions on how to improve the roaming functionality or experienced the same problem?


Offline Dogbreath

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #1 on: October 11, 2018, 04:44:21 AM »
I have a customer using these with Ruckus and doesn't have this problem. There may be a brief drop in audio, but nowhere near 1 minute.

Offline acejavelin

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #2 on: October 11, 2018, 05:27:49 PM »
Do the D-Link AP's support WMM-PS? We have seen large deployments that do not support it have issues similar to what you describe, the Mitel 5624 does not require it (like Spectralink) but will use it. Had to change out 30 Open Mesh AP's to Meraki because of it.

Offline maximumboost

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #3 on: October 15, 2018, 03:32:50 AM »
@Dogbreath - The voice stream doesn't drop for 60 seconds, it's the roaming process that can take over 60 seconds.
The 5624 phone hangs onto a WAP outputting signal at a strength of -80 to -85 dbm when you're standing directly under a WAP outputting signal at -30 to -40 dbm.
When the phone finally does roam you may get between 5 - 15 seconds of silence or garbled voice.

@acejavelin - U-APSD is turned on in the radio profile for the 2.4Ghz / 5Ghz radios which I believe is the same as WMM-PS.

Offline Gambler

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #4 on: September 14, 2020, 04:59:54 PM »
DogBreath - How do you have the phones configured to work on the Ruckus network?

Offline sunspark

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #5 on: September 16, 2020, 12:51:04 PM »
DogBreath - How do you have the phones configured to work on the Ruckus network?

i'm looking also to this information , if any one know if we need to use WMM PS or not .

Offline Dogbreath

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #6 on: September 21, 2020, 06:07:30 AM »
I am pretty sure WMM was on - I remember something finicky about the WLAN when setting this up. Unfortunately I can't give you any more detail as both the Ruckus and the MiVB in question were decommissioned and we've never deployed any 5624's [or Ruckus] since then.

Offline mark.vanderheijden

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #7 on: September 25, 2020, 10:48:11 AM »
Have seen cases where the SSID was hidden and giving roaming issue's

Offline sunspark

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #8 on: September 25, 2020, 04:55:18 PM »
But in hospitality environment you can't show ssid : wifi_5624  :)

Offline acejavelin

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #9 on: September 25, 2020, 05:27:29 PM »
But in hospitality environment you can't show ssid : wifi_5624  :)
Name isn't relevant... Give it a SSID like "housekeepingcarts", "hvacmonitor", "internalonly", or "NO INTERNET AVAILABLE" and no one will care it's there, or just use a random generator and call your SSID "eZzKr5&2WodQ%Y#" and use MAC address filtering if necessary.
« Last Edit: September 25, 2020, 05:30:58 PM by acejavelin »

Offline sunspark

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #10 on: September 25, 2020, 05:51:16 PM »
I'm not sure that's the source of the problem

Offline NEPhoneGuy

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #11 on: September 29, 2020, 06:09:46 PM »
Just saw a bulletin on these. FYI. The 5624s are going EoL and the 5634s are replacements.

Offline sunspark

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #12 on: September 30, 2020, 03:56:12 PM »
Just saw a bulletin on these. FYI. The 5624s are going EoL and the 5634s are replacements.

where did u find this information ?

Offline NEPhoneGuy

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #13 on: October 01, 2020, 12:18:29 AM »
InfoChannel from the Mitel portal. I think it's a mess but I try to look at it every few days because the front page there shows the latest stuff.

Offline sunspark

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Re: Poor wireless roaming performance with Mitel 5624 Wi-Fi phones
« Reply #14 on: October 01, 2020, 05:46:17 AM »
Mitel announces manufacturing discontinuation and end-of-sales/end-of-life for the Mitel 5624 WiFi Handset
and the Mitel IP-DECT IPBS 432/442 base station products due to end-of-life components.
The products are replaced by new product introductions of Mitel 5634 WiFi Handset and Mitel IP-DECT IPBS
532/542 base stations


 

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