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lois - 13th August 2009  (14:27 GMT)

OML Means Transmission Issue But There are lot of Issue Related about OML fault.

Pix - 30th July 2009  (13:53 GMT)

Hello,

If the VSAT link is "up" while the BTS is rebooting, I would say the problem comes from the BTS itself.

Does it happen regularly ?

And only on one BTS ?

I would check all BTS timers, ensure that they are well sized to take into account the 500ms RTT, and check the BTS Alarms to investigate what caused the BTS down.

Muhammad Amir - 30th July 2009  (09:24 GMT)

We are VSAT service provider for GSM operators, we are facing a OML fault alaram on our MSC end over our VSAT media. Can anyone tell me that it can be a media fault or it comes from BTS or MSC end.

we are using Ercisson BTS. when OML fault comes, our VSAT media is remain sync and shows UP but site goes down and after passed some hours, the site goes UP automaticaly without doing anything.

Please Help !!

Rex - 2nd July 2009  (19:48 GMT)

Hi,
I don't know about Ericsson.
BR

KRISH - 1st July 2009  (17:20 GMT)

hI ,

THANKS CAN U TELL ME WHAT IS RF PERFORMANCE ALARM IN ERICSSON .IS IT RELATED TO VSWR?


(2)LOCAL MODE ALARM

(3) TS SYNC FAULT ALARM

(4) BTS INT AND EXT AFFECTED AND UNAFFECTED ALARM

Rex - 1st July 2009  (16:37 GMT)

If Abis is OK and OML down that means BTS still works with the configuration it has in that moment and will carry traffic. But, it's not possible to control BTS from OMC-R (do any changes etc.), you can't know what it happens with BTS, is it really working or not. Somebody should go to the site and reset BTS.

krish - 1st July 2009  (16:15 GMT)

Hi,

then what it will affect ? will it not affect the traffic?

Vito - 1st July 2009  (10:10 GMT)

If OML is down, BTS can carry traffic. OML down = no supervision.

SUMA board is responsible for supervision at BTS

Vito,
NOC engineer

Tanuj - 26th June 2009  (18:57 GMT)

If OML is down it only means that OMCR is not able to monitor the bSC and BTS if the signalling with MSC is working then the bts and bsc will work fine, oml down doesnt mean traffic is down

OML - 11th June 2009  (04:37 GMT)

CLEAR

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