- This topic has 7 replies, 1 voice, and was last updated 3 years, 3 months ago by Mer.
16th July 2007 at 14:22 #48219MerGuest
I have a problem in an Alcatel BTS A9100 (indoor GSM 4+4+4), the problem is located in sector 3 with 4 TRX (X polarisation antenna:+45,-45),always there is one TRX down with this message(alarm 10 class 10 in BTS Terminal):
TRE-VSWR:a fault has been detected by the VSWR supervision on the TRE output during initialization or operation states…
the TRX is changed, the combiner is changed,the cable between TRX and combiner is also changed (VSWR of sector:1.1 1.1), this problem affect one,two or three TRX in the same time, now three TRX work and one is locked.
thanks for all18th August 2007 at 11:23 #48220aristotleGuest
you may need to reset the BTS to refresh the SW. However, you have not mentioned if you performed sweep test with site master. Try to check this as well.18th August 2007 at 17:11 #48221pixGuest
normally, this is an ANC failure… have you tried swapping TRX with another one ? The faulty TRX is the same, or is it the new TRX becoming faulty ?
I would exchange the ANC by another one again, from sector 1 or sector 2, since they are working.
You could also try changing the SUM card… and eventually, change the whole BTS 🙂25th April 2008 at 07:58 #48222ShahnawazGuest
in fact we are also facing the same problem, TRE5 of SectorGSM C,after lock/unlock TRE got busy but after some time it went down again
what we have done so far is:
-changed the TRE
-changed the CSO3 cable
-changed the port of the ANC
-changed the slot of TRE
-done the offline comissioning of SUMA
what next? please suggest if im missing some thing….25th April 2008 at 18:59 #48223pixGuest
bts cabinet inner cabling, possibly ? it looks like you have changed everything inside the BTS, so maybe the BTS cabinet is faulty.
Have you tried to delete the cell, and recreate it from scratch ? Re-homing it to another TSU/TCU ?
I don’t know… just suggesting.. you can also contact your regional support.27th April 2008 at 09:01 #48224MerGuest
in our side, we don’t find a solution or an explanation to this problem but we note some thing:
after we make an offline commissioning, the problem return to the initial state (the famous TRE 9).19th September 2018 at 16:57 #48225anujGuest
its been 10 year did anyone find the solution of it?19th March 2019 at 09:30 #48226MerGuest
hhhh, yes more than 10 years 🙂
the Whole region was swapped from ALU to Huawei