- This topic has 18 replies, 1 voice, and was last updated 7 years, 11 months ago by brother.
20th April 2009 at 12:04 #56839TimzGuest
I’m working for an operator with Huawei equipment. We are experiencing lots of One way speech+silent calls problems. Please help on this matter. I start to hate Huawei since my previous operator (Ericsson) didn’t have such a mess.
Timz20th April 2009 at 16:00 #56840HSHGuest
1- Faulty boards and Especialy the CDU,
2- Board slot on the BTS (Back plane),
3- TMU board,
4- BEU board or GEIUB in the new version,
5- Trans coder buses (between BSC and MSC),
those the main reasons and I already phase and its fixed after I changed GEIUB board one time and back plane in others,
Regards20th April 2009 at 17:34 #56841DonGuest
I don’t know about Huawei Equipment too much, I working with Ericsson Equipment. about Silent Call maybe It was happened because non-matching CIC number. Try to check this. same timeslot same CIC 🙂
I’m not sure that It will be help you or not, but I had been face this problem.
Thank25th April 2009 at 19:26 #56842HuNiGuest
For me also CIC mismatch caused silent and echo calls.
HuNi28th April 2009 at 11:00 #56843SwapnilGuest
I am working in Huawei.
This must be becuase of CIC mismatch. U make sure CIC defined on MSC and BSC sides match. Time slots is no problem as signaling must be ok and so call is setup.
If CIC is also matching then reset Eter interface(TC) and also ask BSC side to reset to get changes in affect.28th April 2009 at 12:40 #56844mohamedSMGuest
it can be problem of wrong connection between E1 coming from transcoder and E1 coming from MSC( DDF side).28th April 2009 at 16:09 #56845kamazGuest
Try to calculate the average duration time (in second) by CIC and you will certainly locate the Pb: CIC with Pb = to low average duration time.
BR’s4th May 2009 at 07:17 #56846inderGuest
Im working with huawei,,,,,please confirm is the call mute happening with the same operator or with different operattor,,,
if it is for the late one….the only problem is CIC mismatch….which we have faced while trying the same.6th May 2009 at 08:28 #56847badyGuest
what is CIC???8th June 2009 at 07:26 #56848wicopGuest
Hi all, I’m working with ericsson. We have a same problem.
1. We have 3G network Ericsson.
2. Our 2G network from Alcatel
2G->3G call – one way silent
3G->3G call – Both silent problem
We can’t solve this problem. Have a any idea?13th June 2009 at 10:16 #56849SATYAGuest
I RECENTLY JOINED IN TELECOM COMPANY. ANY ONE CAN TELL ME THAT WHICH BOOKS HELPFULL FOR ME TO IMPROVE MY KNOWLEDGE IN TELECOM27th July 2010 at 09:44 #56850djoaimeGuest
I’m facing one way calls to international carriers. we have checked all CIC between us and our international carriers we did not find any problem. I want to know if with Huawei MSOFT or FSOFT we have a performance task which can give MHT of CIC?
BR,22nd April 2012 at 06:23 #56851BabekGuest
We are using Ericsson equipment in our 2G and 3G network and are faicing with “silent call” and have checked all CIC, but problem still continue. Could someone tell another check point :-)?22nd April 2012 at 21:03 #56852IanGuest
We got the same thing here with Alcatel, need to check your TCU (TCIF):
1. make sure you have the last version of TCIF unless you would need to upgrde
2. check TCU card by listening on each card for Silent call, it might take some time but it works
3. We also noticed here some card reconfigured with MU-law instead of A-Law, check this as well
Sometimes its TRX problem but most of the time it comes from TCU if the problem of silent call is happening anywhere/anytime.
If 3G to 3G is giving trouble as well, then it might be a wrong config of NGN.
Ian20th March 2013 at 22:42 #56853AlyGuest
we have ZTE BSCs and facing a silent call with it .
any solution plz?