MTNL shareholders; approve Rs 6,500cr NCD issue, monetisation of land and buildings During the extraordinary general meeting of Mahanagar Telephone Nigam Ltd (MTNL) which was held on Wednesday, 99.89 votes were cast in favour of the issuance of "guaranteed, unsecured, listed, redeemable non-convertible debentures in the nature of bonds (NCDs), in one or more series/tranches, aggregating up to Rs 6,500 crore on private placement basis," MTNL said in a filing to BSE.