FIU and RRI both are connect to ODU of microwave antenna. The difference is RRI is used in ultra BTS where as FIU is used in Flexi BTS.
You are right about Ultra if and only if you are talking about one cabinet, but regarding Flexi we don't say it can support up to 24 TRS. Plus, Ultrasite Cabinet can support up to 12 TRX. So we measure by cabinet in Ultrasite and we measure by ESMA/ESEA in Flexi. ESMA can manage only up to 12 TRX where it contains only 6 bus and power ports. ESEA Can support up to 24 TRX. But for your info, Flexi modules can be installed in Cabinet, 19" Rack, Stack, Pole and Wall mount depends on the design.
nokia 6680
how it get my license key in ultramp3 her my imei no.355683001943301
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Samsung S8300 Tocco Ultra, LG KF510, Nokia N97
Ultra BTS can support max. of 12 TRx (trancievers), while Flexi can support max. of 24 TRx. Ultrea has drawback that it has all Pin connections on back side, if any of the Pin of a particular slot is damaged then that slot is useless, while in flexi all connections are on front side so it is easy to install every equipment. As an operator wants to cover maximum area he will use flexi. you can say ultra a bts of old times. so, it is the difference my dear. however, one TRx card supports 8 time slots i.e. max of 8 users, but not practically. It will support max. of 7 callers. Capacity in terms of users can be increased using Half rate, i.e. A TRx will support approximately 14-15 users at half rate transmission, half rate is used during bysy hours, i.e. on one time slot 2 user will send their data/speech, with a half rate of 5.6 kbps, but at half rate voice quality is not very good. Simply one time slot will be assigned to two users in Half rate. So both of them(Ultra & Flexi) support equal no. of users if having equal no. of TRx.
Ultra mp3 works on phones that have the Symbian operating system like Nokia. Ultra mp3 works with the mp3 and ogg music formats. You can download ultra mp3 here: http://ultramp3-s60.en.softonic.com/symbian
What is the difference between a regular memory card and an Ultra Memory card