Dect R4 base station sync/signal issues

[rm81]

HI everyone,

We recently installed a dect R4 system with 4 base stations 1 internal master and 3 externally housed bases with 3720 dect handsets connecting back to an IP500 V2 running on software level 6.0(18)

The solution has been running fine for over a month however yesterday the client reported that one of the base stations appeared to be producing a much weaker signal output (basically reduced/no signal on the dect handsets operating in the vicinity of that base station)

All of the base stations are connected back to the IPO via cat 5 cabling (provided by the client) terminating to a POE switch with all cable runs less than 100M with no breaks in the runs (pinging to the base station IP address produces no packet drops).

cheking the configuration of the unit specifically looking at device overview/Air Sync, and comapring against the other slave base stations onsite I can see that the Frame error rate is significantly higher peaking yesterday at 100 with the RSSI fluctuating from -71> -93 with drift currently running -1.3547 and sysnc offset anywhere from 0ns> 1400 (hoping someone could provide a definition of what drift and sync offset relate to as i am relativly new to dect).

I'm relativly new to installing the dect solution so my trouble shooting knowledge of the product is limited (three installs over the last 6 months all of which i've carried out using the dect R4 documentation and thus far have had no issues)

I reset the base unit last night out of hours confirmed with the client that new new machinery or radios have not been installed in the area that could affect the unit. Monitoring this AM can see in device overview > Air sync against the active sync bearer settings currently showing as below

Carrier: 3 Slot: 9 Hop: 0 RSSI: -106 FER:-88 (affected base station)

I'm hoping that someone would be able to advise what are accpetable freshold figures for FER,RSSI etc, and if possible provide some help/diagnostic tips as I was unable to obtain these from our distributor.

Currently all diagnostics have been carried out remotely.

Many thanks for taking the time to read this, grateful for any help/advice offered

 

[tlpeter]

Are there any new build walls in between the base stations?
Is this a new building or are they renovating it?


When you pay peanuts, you get monkeys!

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[rm81]

Hi thanks for the reply,

This is an existing build with no new walls or structural steel in place.

Currently the bases are set as such, Master base locaed centrally internally with the 3 additional bases located extrnally.

Knowledge....makes your head hurt

 

[tlpeter]

Do you have a mix of compact and normal base stations?
When you do have this situation then you must be sure that the master base station is a normal dect base station!!!



When you pay peanuts, you get monkeys!

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[rm81]

Hi TLpeter

The equipment supplied for the installation is as follows
x4 Dect IP RBS W/Int Antna (not sure if this is classed as a compact or "normal" base) connecting to a netgear FS108p POE switch, all of the kit supplied was suggested by our local distributor.

Thanks again

Knowledge....makes your head hurt

 

[tlpeter]

Then i have no idea.
You could arange those basestations a bit better.
Or add another one.
When it was much better before then perhaps the basestation is dying.


When you pay peanuts, you get monkeys!

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[rm81]

Thanks for your time peter its appreciated, we may have to monitor and look into installing an additional base to aid with handover in that area.


Knowledge....makes your head hurt

 

[Escorthosis]

The RSSI for sync over air should be max -90dB so -106dB indicates that this basestation has trouble finding the sync master.
Reposition te basestation or place one between the two.

The value of -90dB is from the manual:

https://support.avaya.com/css/P8/documents/100073333

 

[reebokman]

Having issues with a Dect R4 connected to IP 500 Ver 6.08. The handsets will periodically lock up and users need to switch off and on again to getthem to work. All firmware in handsets and basestations up to date. This is happening on most of the 9 handsets installed, anyone got any ideas??

 

[CarGoSki]

Log inot the web base app for the dect and you will likely find that one or more base stations no longer have ip address assigned to them. I would suppoe that it would be those in areas that are now weak. Look further in the dect web app and you will see the link to reset the dect system. do it.

Once complete you may find that your base stations all have ip addresses and the weak areas have been restored.

 

[rm81]

Hi Guys,

Before adding another additional base in the area i ended up leaving the existing master (the internal unit closest to the ip500) as the "master" and assigning the most central of the 3 external bases as the air sync master which appeared to have resolved the issue (obviously last resort prior to an additional base being installed)

Knowledge....makes your head hurt