BSNL pre-paid broadband services details are available in the following BSNL link :
http://www.bsnl.co.in:9080/opencms/bsnl/BSNL/services/broadband/prepaid_BB_index.html
There are two types pre-paid plans available
Limited Download: There are 9 types of vouchers of different denominations which offers limited download at speed upto 2 Mbps within the validity period of the voucher.
In addition, there are two other types of Recharge Vouchers for limited plans. One, for extending the validity period (Validity Voucher) and the second, for increasing the usage (Top up Voucher) within the validity period.
Prerequisite: The customer interested to subscribe for Prepaid broadband service should have BSNL landline connection.