Trai seeks upgrade money

 Trai has also said the burden of the investment will be shared by all operators and not just Bharat Sanchar Nigam Ltd (BSNL), which being the largest and oldest network in the country, requires maximum upgradation.

 Carrier access codes (CAC) allow customers to chose the long distance operator by dialling a pre-designated number allotted to the specific operator. It is expected to bring real competition into long-distance services.

 For instance, if a Hutch mobile subscriber wants to route his STD calls through Bharti