- This topic has 5 replies, 1 voice, and was last updated 12 years, 7 months ago by finn.
10th September 2008 at 20:39 #53850kamalGuest
I wanna know d functioning of BOI,FXC-RRi & BB2F.
Also say something about “throwing an E1”..
What is FIU? And what is d purpose for the same?
What is 2M interface?20th September 2008 at 06:16 #53851finnGuest
throwing? maybe through an E1? please check other threads for E1/2M explanations. FIUs are for Nokia PDH,modem..BOI is like DXU for Ericsson? am i right?7th October 2008 at 12:35 #53852deepak pardeshiGuest
i am deepak
plz tell me the Fundamentals of BTS site8th October 2008 at 07:19 #53853finnGuest
that is one of the most common question.. BTS site of what? CDMA? GSM? WCDMA? let’s try one of the most common, GSM.. or 2G.. a BTS is usually installed either 900 or 1800 or 1900 or some 800 i think in the US? its powered up by a rectifier or a battery backup system plus 220VAC and feeder cables connected to combiners of the BTS going to the antenna.. either directional or omni depending on the design by RF engineers depending also on thedemand in the area. like if a motorway, usually back to back panel antenna.. in country sites omni will do.. in in-building solutions or IBS they are using DAS or distributed antenna system.. the traffic is transported via E1 (PCM) from PDH transmission system.. sometimes groomed from ericsson’s DXX.. i dunno about other vendor… then from PDH to SDH hub.. then to the BSC.. others please add12th October 2008 at 18:20 #53854FLM memberGuest
The aim is to carry the traffic to BSC through other BTS sites which can be configured in diferent kinds of topologies.
They can be chain, star, lop,mesh.
I think the most common is chain as the most reliable topology is loop.
other please add.13th October 2008 at 09:09 #53855finnGuest
yeah loop… on an SDH network.. hub sites with add-drop multiplexers.. from STM-1 to STM-16.. sub-hub sites uses STM-1 then backhaul access with PDH links and sometimes to make useful of the timeslots, they use DXX to do that..