how does synchronisation possible in GSM?
106067
Cell phones, no matter what technology, use a paging channel with which they detect nearby cellsites and establish communication through control channels, which deliver synchronisation info. The control channel also establishes calls and manages the phone handovers to other cellsites.
12134
Only if you use GSM Triband or something like this. \nYou can send sms but must put countrycode.\nGood Luck\nTry sms.ac
927810
you used to be able to synchronise by creating a new account in the options tab but it doesnt work anymore.
894541
just ANDing   Q'.s=J and ANDing Q.R=K and u can give a clock pulse also for synchronisation
132618
When somebody is calling you, the network send the message to all Base Station, and your phone answer "I am here". The network assign a channel between your phone and the Switch, and complete the channel with the calling phone.\nWhen you start moving, the phone measures the power and check which Base Station is near to change. The network orders the Handover from one Base station to the other.\nThe Cell Phone "talks to" Base Transceiver Station (BTS); the BTS is linked to Base Station Controller (BSC) and the BSC is linked to MSC or Switch. Switches are interconnected to other National, Cellular and International Switches.\n(A Switch is a Phone switching central).\nTHe interconnection between BTS-BSC, BSC-MSC and MSC-MSC is by Fibre Optics, Microwaves, Satellites, twisted cupper pairs...\nHope it helps.
542135
this question is wrongly put in this forum. This should be in the homework forum. And you will do yourself a favour by solving that problem yourself. Trust me, it teaches you a lot about how to synchronize stuff.
100730
CDMA2000 and GSM cell phone technology
6797
Becuase your mobile provider has to pay for a freqency range to use and generally mobile phones are used to recieve more than send. Also if you compare the size of the transmitter/arial and battery in your mobile to a base station transmitter you will see there are also physical reasons why you can't transmit faster.\nFor more details you should look into exactly what system your mobile uses GSM is a very wide-ranging term. You should look up technologies such as code division multiple access and the general packet radio service as well as comparing 2,2.5 and 3g technologies.
277022
I could come up with this!\n\nFairness Algorithm: Packet Rings also have an inherent advantage for implementing fairness algorithms facilitating. \n\nRing bandwidth is a shared resource and is vulnerable to exploitation by individual users or nodes in the network version of the “the tragedy of the commons. \nA fairness mechanism that gives every customer on the ring a “fair” share of the ring. \nA ring-level fairness algorithm can and should allocate ring bandwidth as one global resource. \nFacilitate bandwidth policies that can allow maximum ring bandwidth to be utilized between any two nodes when there is no congestion can be implemented without the inflexibility of a fixed circuit-based system. like SONET but with greater effectiveness than point-to-point Ethernet.\n\nAlso.........\nThere are a few algorithms used in GSM. A3 is used to authenticate the user. A8 is used to generate a session encryption key. A5 is used to encrypt the session (there are 3 variants, A5/0 A5/1 and A5/2). Additionally the SIM card contains a user key called Ki.\n\nA3 and A8 exist on the SIM card. They are selected by the provider (COMP128-2 is the reference algorithm provided by the GSM Association however in the next generation this will change to an open algorithm after repeated cracks). The provider will have SIM cards made with Ki, A3 and A8 put into the SIM, and they will have the identical information in their databases. This information is never sent across the network under any circumstances.\nA3 and A8 are just place holder names, and do not define any specific algorithm. Rumor has it that Vodafone never used COMP128, so in 1999 when that was cracked, they were not vunerable. \nA5 however exists in the handset, and in order for the phone to work everywhere, the algorithm has to be the same. If it were not, you would get encryption in one place but not in others. One interesting note is that the user has no idea if encryption is enabled or not. This is a bad design flaw. The user may hear from sales literature that there is encryption and that the phone call is 'secure' when infact it is not.\nThe A3 algorithm is a one way hash. It takes a 128 bit number (provided by the cellular provider) and the Ki and generates a 32 bit response SRES. A8 will generate Kc, a 64 bit key that is used as the key for A5. Most implementations generate a new key for each session (a session is any time the phone and the GSM provider need to exchange data when they previously were not, such as a new call being placed). One problem with COMP128 is that 10 bits are all zeros!!! This is an intentional weakening of the algorithm (to help law enforcement who can get a warrant and does not need to crack the crypto???) by a factor of over 1000. The 64 bit encryption becomes 54 bits. I am unsure if COMP128-2 has this problem or not, as that is not published and is available only under string licensing from the GSM MoU in Dublin, Ireland!
453440
There are plenty of companies working on ways to make this type of service available, most likely through the use of bluetooth or some other technology (certainly NOT through text due to lack of security).\n\nThere are no currently viable options to use this today however.
840823
GoFreeSMS (http://www.gofreesms.com/freesms.html )\n \n- Send unlimited SMS message from the net or cellphone to phones around the world\n- Provide your country or city name, then select the mobile carriers
706963
It can be done but it's a very expensive and very slow way of connecting to the interweb.\n\nHere's an example\nhttp://www.nokia-asia.com/nokia/0,,79378,00.html\n\n///
665760
Be more specific, please.  What type of mail system are you attempting to synchronize with?
516128
Here is some information from wiki about security:\n\nEarly mobile phones did not have much security designed in. Some problems with these models were "cloning", a variant of identity theft, and "scanning" whereby third parties in the local area could intercept and eavesdrop in on calls. Analogue phones could also be listened to on some radio scanners.\n\nAlthough more recent digital systems (such as GSM) have attempted to address these fundamental issues, security problems continue to persist. Vulnerabilities (such as SMS spoofing) have been found in many current protocols that continue to allow the possibility of eavesdropping or cloning.
448898
from http://mobilinkgsm.com
823644
I would think that the software that came with th modem already has this feature! If not, you might try cheyenne bitware!
378905
does your mobile phone have that feature? otherwise your network provider has locked it so you can only get it from them