You need to give the set top box number and the amount to recharge or top up to the guy.
He will send the information to SD who has authorised him to acccept money and the set top account is recharged to the amount we have paid .It is exactly similar to the easy recharge that we do for BSNL.Airtel etc where we giver our mobile number and the amount to recharge .....
We also get sms once recharged like mobile recharge ..it takes hardly few miniutes to do this.
I checked immeditely my account information in the internet and it was updated for the amount paid with date and time.
Hope I am clear.
and do not forget to get the confirmation number, for future reference in case of any problem..
but anyways, now its very easy to recharge than before.