help for high call drop

[marzie]

Hi every body
we have site in siemens system which recently increase its config(2/2/2=>2/4/3) but after that we face high call drop.
In one of the sectors I changed half of the channel from HR to FR but CDRs become worse!
in the KPI measurement files the main reason for CDR is " sequence error"
dose any body have any idea for solving this problem? please help me
thanks a lot

[radenmohawk]

Check parameter, how about freq (Use Baseband of SFH), is it clear?
Have you seen CTRX statistic (RXQUAL vs RXLEVEL)? TRX upgrade is problem.

[electron]

Hi every body
we have site in siemens system which recently increase its config(2/2/2=>2/4/3) but after that we face high call drop.
In one of the sectors I changed half of the channel from HR to FR but CDRs become worse!
in the KPI measurement files the main reason for CDR is " sequence error"
dose any body have any idea for solving this problem? please help me
thanks a lot

So since it happened exactly after TRX expansion let's check the hardware at first. maybe FM team plugged some faulty TRX

[OptimiNSN]

This is Hardware Faulty or bad instalation.

[marzie]

thank you all for your reply
in this site we use hopping and the freq. are clear, also RXQUAL and RXLEVEL are normal,
about the hardware fault, do u think it would be ok if we just check the vswr and alarms?
i would check and inform you about the result