How to configure INNO MEDIA MTA 6628 1BE2s device for using BSNL BROADBAND internet

[hema413]

I have this 2008 model inno mediaMTA6628 1BE2s device which I am now using for BSNL Broad band.I tried to confiure the modem by accessing it with 192.168.99.1 ip but not able to access the net.BSNL technicians replied that they are not able to do as is is new for them.I tried to go through manuals at innomedia website but of no use.Kindly help me as to how to configure this modem.Previously the modem is configured for RELIANCE Broadband.Kindly help me.Thank you.