- This topic has 252 replies, 1 voice, and was last updated 8 years, 8 months ago by
DangerousMinds.
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Faisal
GuestHello All
Is there any place on the web where i can find technical conversion tables for eg watts to dbm and the terminologies used in gsm communications
Thanks
Saikat Sarkar
GuestHi,
I want to know about the Working Procedure of SIEMENS BTS 240/240XL
hame
GuestHi everybody,
How can I calculate availability (%)in the radio interface of GSM network from the performance aspect.
Than YouDharmendra
GuestPlease tell me what is GSM anteena and how it works, what technology they are used.
JCD
Guest“Please tell me what is GSM anteena and how it works, what technology they are used.”
To be honest I don’t know what you mean… but any mobile telecom antenna is pretty much alike.. there are two types, Omni and Directional.. both uses Air Interface.
raj
Guesthow many TRU can one E1 accomodate under different concentrations
S.Vijay
Guestatul shukla
Guesti wnat to know hardware description of RBS 2206 ericsson BTS n knowledge of CDU, TRu.
vijayaraj
GuestHai vijay&raj,
Three types of LAPD configuring methodology used while using a single E1 in ERICSSON.
1.LAPD Concentration.
2.LAPD unconcentration.
3.LAPD Multiplexing.In LAPD concentration 13 TRU’s can be used with a single E1.
In LAPD unconcentration 10 TRU’s can be used.
And in LAPD Multiplexing 15 TRU’s can be used.raj
Guestthanks to anonomous helper
raj
GuestBSS : thanks anonymous helper
Daniel
Guesthi, vijayaraj
———————————
1.LAPD Concentration.
2.LAPD unconcentration.
3.LAPD Multiplexing.In LAPD concentration 13 TRU’s can be used with a single E1.
In LAPD unconcentration 10 TRU’s can be used.
And in LAPD Multiplexing 15 TRU’s can be used.
———————————
would you like explain more about LAPD?1.LAPD Concentration: 13*2+(13 div 4) = 26+4 = 30 < 31(E1 TimeSlot) 2.LAPD unconcentration: 10*3 = 30 < 31(E1 TimeSlot) 3.LAPD Multiplexing: 15*2= 30 < 31(E1 TimeSlot) Am i right? In method 3, how is the LAPD signalling transfered to BSC?
Daniel
Guestand you know, vijayaraj
there are two kind of LAPD Multiplex, MPLEX16 and MPLEX32, what are the differences?
vijayaraj
GuestHai daniel,
its not 15*2.It should be 15*1.75=26.25.Others for TRU signalling.waleed
Guesthi fisal download good free engineering calclator from this website:
http://www.engnetglobal.com -
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