BSNL and other net providers vary in the sense, others do make money by calculating and charging higher; BSNL has a fair practice; but expansions are so slower than the rest, and the resultant is, people wish the others are doing good and switch over. Even today in the bid BSNL did not make up for the 5G. Whereas roaming charges will burst with the others' sevas, BSNL adopts only a fair calculation. BSNL customers also give up LL as they have cell phones. But the cell phones, whichever service providers they may be, one has to run to the outside, balcony and road for the SIGNAL. On the other hand LL can be handled from where you are sitting so breaking the LL is a worse decision. Again the copper connection to the landline is a working concept of 24 by 7 unless rain creates any disorder. On the contrary the fibernet with the phone number landline, will be out whenever the electric supply is cut off and internet goes out; even with the generator, may last as long as your generator is working. On Dec 20.. when TN was cut off with the flood, only LL copper was alive in my home and we could communicate even without the electricity. BSNL generators were powerful even today. The best immediate services, subject to the conditions of the approach to a place, are far better when compared to other providers who cannot be contacted personally as well as only through the 1 800 services and wait for 3 days. KR IRS 241222
On Sat, 24 Dec 2022 at 05:13, 'gopala krishnan' via Thatha_Patty < [email protected]> wrote: > *MOBILE PHONE PART 2* > > *Continuing from part 1* > > Dear friends, > > I am thankful to the response of Sri TNC Rangarajan, former High court > Judge about the posting of Part 1 with added information that BSNL plans to > convert all landlines to fiber optics and the link about the information. > I am continuing with part 2. > > Gopalakrishnan 24-12-2022. > > *10 Initial use of mobile phone* > > While mobile phones were introduced, *the cost of mobile phone was > prohibitive even to middleclass*. The call charges were based on minutes > of usage, *incoming calls were charged*. When the subscriber used mobile > out of the district, *roaming charges* were added. Topping was done with > charging card. Card purchased in a state had to be used with in the state. > Later mobile topping changed to shops dealing with mobile recharge. Mobile > charging shops were busy with topping up. *If any mistake was there in > giving the number the amount paid was lost. The same continues now also.* > > Subscribers noted the incoming call number and made call from Land phones. > Mostly very important mobile calls were only attended because of charging > for incoming calls. > > 11. Mobile company adding money to subscriber account. > > All mobile companies provided with Rs 10-00 when topping amount got > exhausted till next charging was made for making/ answering emergency > calls. It was deducted on next recharge on the available balance. *This > procedure is more now.* > > *12 All mobile phones in a home under one account* > > Now most companies implement all phones under one account as postpaid > bill connection. I have my Airtel mobile, my son’s Airtel mobile, my Airtel > data connection comes in one account as postpaid bill. > > This is in addition to my BSNL mobile connection, Land line and internet > connection. The advantage of airtel data connect is it functions on > battery and usable when power failure is there. > > *13. Present day charging* > > Now charging is done for days, certain amount of data, any number of calls > free with in India. I recollect the trunk calls were charged Rs 16-00 for > 3miinutes. From land phone certain number of free calls are allowed. No > separate charges for STD calls. ISD calls are charged more either from > mobile or Land phones. For validity separate charging is done. > > *14. Mobile phones working.* > > When the Mobile phone is used for the first time, it sends a number called > International Mobile Subscriber Identity – IMSI present in the SIM card to > the network, *which looks it up in a database to ensure the card is > registered*. If the IMSI is recognized, the network creates another > number called a Temporary Mobile Subscriber Identity (TMSI), which is > encrypted and sent back to the phone. In all subsequent calls, the phone > identifies itself by broadcasting the TMSI. > > *15 What happens when we make a call?* > > When we switch on the mobile phone, it tries for an SID on the *Control > channel*. The Control channel is a special frequency that the phone and *base > station* use to talk to one another. If the Mobile phone finds difficulty > to get link with the control channel, it displays a “no service” message. > > *My note- This situation occurs when tower fails or* base station has > problems. A hand held mobile is connected to base station through towers. > There may be tower/towers near his phone to substation. > > If the Mobile phone gets the SID, it compares the SID with the SID > programmed in the phone. If both SID match, the phone identifies that the > cell it is communicating is the part of its home system. > > *The phone also transmits a registration request* along with the SID and > the MTSO keeps track of your phone’s location in a database. MTSO knows in > which cell you are when it wants to ring the phone. > > The MTSO then gets the signal, it tries to find the phone. The MTSO looks > in its database *to find the cell *in which the phone is present. The > MTSO then picks a frequency pair to take the call. > > The MTSO communicates with the Mobile phone over the control channel to > tell it what frequencies to use. Once the Mobile phone and the tower switch > on those frequencies, the call is connected. > > *When the Mobile phone move toward the edge of the cell, the cell’s base > station will note that the signal strength is diminishing*. At the same > time, the base station in the cell in which the phone is moving will be > able to see the phone’s signal strength increasing. > > The two base stations coordinate themselves through the MTSO. At some > point, the Mobile phone gets a signal on a control channel and directs it > to change frequencies. This will switch the phone to the new cell. > > *16 Summary* > > In mobile working system *an area is divided in to circles*. The mobile > phone will be in a circle. Through a control frequency the mobile is > connected to a base station via tower. The dialing is done through this. > The subscriber talks through another set of frequencies. > > The technical details will be told in simplest language possible. > > Earlier each communication company had there own towers. Now towers are > shared. On this account we can see many dishes/receivers in a single tower > nowadays. > > *I will continue in next posting* > > > > -- > You received this message because you are subscribed to the Google Groups > "Thatha_Patty" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/thatha_patty/685305961.2799967.1671887596193%40mail.yahoo.com > <https://groups.google.com/d/msgid/thatha_patty/685305961.2799967.1671887596193%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/CAL5XZoqk4shoifmk35oRSJ60nEALpu7k%2BDdqMN%3D_XoSjVD4nmA%40mail.gmail.com.
