Dect phones lose signal when a plane passes overhead

[DirectelTech]

Hi there, any bright ideas would be appreciated.

I have a client, who is in the landing path at a major airport who is complaining that every time a plane passes overheaad, their DECT phones lose signal.

Any idea's on how to get past this.

Thanks in advance

 

[sizbut]

Common enough with radio signals, its the whole basis of radar, but that implies that those large metallic tubes are passing very close overhead in this case, close enough for the reflected signal to momentarily confuse the phones and base stations.

Ask around, visit the neighbours to find out if they've had problems and how they fixed it. If it a really large airport ask them, they may have their own specialists in signals interference since its a issue that cuts both ways.

Meanwhile, short of covering the entire roof with wire mesh to act as a screen it's either move or wait until carbon-fibre airframes are the norm.

Stuck in a never ending cycle of file copying.

 

[DirectelTech]

Hi Sizbut

One key bit of info I forgot to share is this is a dealership, that is remote to the actual Avaya. By saying remote I mean they are two separate buildings (100m apart), connected via fibre. The one site hosting the Avaya has no issues, only the remote building. The remote site have no complaints on their Desktop IP phones, I thought it may have been a fibre issue, but the desktop phones rules that out.

And to make it worse I have 3 other clients in the same flight path, each with their own IPO's and DECT systems, and they have never logged a single complaint. So that rules out the actual Aircraft causing the issue.

Very stumped and confused!!!!

 

[janni78]

Has someone been onsite to see if this actually happens when a plane passes, if so it should happen several times a day.
What does the DECT stations log say?

Had an similar issue which was caused by bad wiring to the master base so moving that might be an idea.

Or you can try aluminum, if planes are affecting the bases it might also be a good idea for the workers

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

 

[sizbut]

Where are the base stations? In the remote building? It is possible for DECT handsets to get a signal at 100 metres from another building so worth checking signal strengths etc. Though in most cases 100 metres would be a weak signal and easily disrupted by signal reflections. Do the phone users roam between buildings, that could cause the phones to have locked to a base station in the main building and not actually have handed over to the a base in the remote building.

Have a good look at the buildings and their construction. It may be that the remote building is physically different in its roof/wall construction, with in this case unfortunate consequences.

Stuck in a never ending cycle of file copying.

 

[amriddle01]

Planes use ILS to land which uses radio frequencies beamed from the airport towards them, they also have radio altimeters and forward looking doplar radar, lots of interference. It's likely just a case of "tough luck" 

 

[amriddle01]

Not forgetting the radios used for ground and air to air comms...