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18th April 2004 at 18:30 #33963a.alghoulGuest
i am a telecommunication engineer interested in NSS part of GSM, i would like to know how the number of E1 required inter MSC is calculated
thanks18th April 2004 at 20:31 #33964VijayGuest
Hi alghoul, The number of E1 required between two MSCs depends upon the traffic flow between those two MSCs.
For eg. If the traffic betwwen two MSCs would be 1000 Erlangs then min.number of E1s required to cater 1000 erl. are 36(using Erl B formula with 0.01% GOS)
Regards18th April 2004 at 20:34 #33965VijayGuest
Sorry that figure is using 0.1% GOS.
R’s19th April 2004 at 11:00 #33966ScotGuest
Hi Vijay ,
This is as per Erlang -B Table ?
What kind of GOS is used in India ?
Scot20th April 2004 at 00:11 #33967VijayGuest
ya Scot, It is nearest approx. of Erlang B.
and 2% GOS is comman in India.
Regards,20th April 2004 at 10:13 #33968ScotGuest
This 2% GOS is aplicable for both PSTN Interface and BSS Interface ?
Rgds23rd April 2004 at 09:28 #33969Khamisi KalegeleGuest
Most of our sites are multiband.We have just introduced a dual band site(1,2,3 GSM 900 Sectors and 4,5,6 DCS 1800 Sectors) with 3/3/3 and 2/2/2 configuratins respectively.
Strange!.DCS 1800 Sectors are experiencing very high TCH Cong.(Up to 75%)while corresponding GSM 900 sectors have always less than 1.5% TCH Cong. Sectors 1 & 4 points in same direction,2 & 5 same orientation and 3 & 6 same orientation.
We tried to set 900 as a preffered band to try balancing traffic load,but it never worked.We also tried to enable directed_Retry,it never worked again.I’m afraid we mess up somewhere when enabling Directed_Retry.Please help advice.23rd April 2004 at 19:51 #33970Hassan AhmedGuest
Before to talk u, my intro
is important to mention.
My age is more then 22 n i am workin in TELIPS company as a system engineer from 2 months..i did my electronic engineering from Sirsyed university pakistan in 2003 .After that!
I have learnt every thing going in telips.it is LL company n i have interest to work with WLL or any Mobile setup. i have great interest to get high knowlede in telecom. Im in situation where i cant do my masters…also i wanna get knowledge to work in field. i shell be very very very thankful if u guid me in such a manner that would possible for me n could make me skill full in telecom field. I am the seeker of knowledge but havn’t right path..
Advise me … Give me guid line plz
n also i need complete info of NSS,BSS n CDMA24th April 2004 at 09:57 #33971VijayGuest
Scot , It all depends upon u to decide for ur network. As far as my network is concern i’m taking 1% GOS both for BSS and PSTN.25th April 2004 at 13:27 #33972ScotGuest
Thanks for your replies.
I would like to know more about Network Optimization and Planning.
If possible give me your mail id firstname.lastname@example.org
I will send you the questions directly.
Scot26th April 2004 at 12:24 #33973BruceGuest
Can anyone help me to find some practical informations about gsm frequency planning?28th April 2004 at 14:02 #33974michelGuest
i want some one explain me the way to calculate the number of sdcch channels in the combined or non combined configuration.9th May 2004 at 12:53 #33975fouadGuest
iam planning engineer and i want some one to help me to make DT
ore to determine which frequency i use9th May 2004 at 16:46 #33976Anwar AhmedGuest
good work as far as GSM design considerations are concerned . i m working in INTERNATIONAL SWITCH PAKISTAN on AXE-10 system by ERRICSSON. on SWITCHING i can help evereybode if one has any query.13th May 2004 at 22:42 #33977MahmoodGuest
Hi, I am working on Core SS7 and have recently experienced very high processor loads on our HLRs. Can some one please guide me to what may be casuing this?.
I very much appreciate you help.