BSNL is the only Government owned cellular operator at the moment in India. With a lot of onus, the company devices tariff plans, provides online BSNL recharge and payments and other value added services for its subscribers that are customer friendly and pocket friendly.
Mobile technology works either through GSM (Global System for mobiles) or the CDMA (Code Division Multiple Access) technologies. The Indian market consists of both the types though it is predominantly a GSM market in the 900 MHz and 1800 MHz frequency band. More than 80% of the mobile subscribers in the market prefer the GSM technology as compared to the CDMA which is maintained at 20% market share for some time now.
BSNL provides GSM cellular mobile service through its brand BSNL Mobile. For its prepaid customers it provides fast and prompt BNSL recharge facility that can be done online from the BSNL website. It also provides fixed telephony service to the Indian market using the CDMA technology and its fiber network. It is also easy to get BSNL Recharge.
What is the difference between CDMA and GSM mobiles?
Both the above are form of mobile technology that uses radio systems. The similarity ends here. The key differences between the two are:-
- GSM was developed much before CDMA technology.
- In GSM the voice is broken into small parts and converted into digital data. This data is then assigned a channel and a time-slot. The receiver on the other end listens to the specific channel and time-slot, combines the data and re-transmits the voice. In CDMA, each call data is given a unique key and all calls are transmitted at one go. The receiver uses the unique key to split the joint signal into individual voice.
- CDMA is majorly the brain child of chip maker Qualcomm whereas GSM is the product of global IT Telecom industry consortium.
- For a mobile to work, two basic things are required – first the handset and second the network. In the GSM network, there are removable SIM cards that can be taken out from one mobile and inserted into another GSM compliant mobile phone. Since the customer information is stored on this SIM card, this changing of mobile devices is allowed in the GSM network. Thus the GSM network has no control over the mobile device that the user is using. Not so with the CDMA technology. In this network, the mobile devices come with prefixed SIM card and the customer information is stored on the network. Hence changing of SIM is not allowed, in fact not possible in the CDMA network.
- The other difference is that all GSM networks facilitate simultaneous communication of data and voice. Whereas in the CDMA networks, one cannot transmit voice and data at the same time.
- GSM networks are faster than the CDMA network after getting BSNL Recharge.
- On the positive side though CDMA offers better call quality, powerful and flexible technology as compared to the GSM network. In fact the 3G GSM is actually supposed to be a CDMA technology called WCDMA (Wideband CDMA).