If i am not wrong then BSNL now dont provide Type III and Type IV modems.
They now provide:
Type I: which has 1 USB and 1 Ethernet (LAN)
Type II: which has 4 Ethernet + 1 Wi-Fi
Modems Provided By BSNL
Nokia siemens C2110 (1 LAN & 1 USB)(*
Listed as Type A
UTStarcom:
UT-3002 (1 LAN)
UT-300R (1 LAN)
UT-300R2 (1 LAN)
UT-300R2U (1 LAN & 1 USB)
WA3002-G1 (1 LAN & WiFi)
WA3002G4 (4 LAN & WiFi)
( * will be Type B)
Sterlite SmartAX MT882 (1 LAN & 1 USB)
Siemens SL2141 (4 LAN & WiFi) ( *
listed as TYPE B
Quidway WA1003A (1 LAN & USB, WiFi)