NTM has a unique collection of telecom equipments, books, documents, photographs and other releted material showcasing the development of telecoms in India since 1835 when first Morse telegraph line was established between Calcutta and Diamond Harbour. Some unique exhibits showcased in the NTM are:-
(1) Heiten Galvanometer used for Morse Telegraph link between Calcutta and Diamond Harbour
(2) Red sandstone pillers used to erect India's first long distance telegraph line between Calcutta and Agra in 1851 over a distace of about 1000 miles . This telegraph system played crucial role in the victory of British forces in India's first war for independence.
(3) Various types of Morse keys, sounders, teleprinters of various types and models
(4) Radio telegraph equipment used during WW I
(5) Baudot Telegraph Machine of 1880 vintage. With this machine it was possible to transmit and receive multiplexed telegraph signals.
(6) Voice telephone switching systems including early Magneto systems with magic eye indicators, Central Battery Manual Non-Multiple and Mmultiple systems, Strowger systems, models of Cross- Bar and E10B exchanges,indigenously developed exchange equipment for rural applications e।g।64,128,256,512 port rural exchanges developed by Centre for Development of Telematics during 1980s, pendulam clocks for generating pulses for various applications in Strowger exchanges,ringers etc etc
(7) VF-VF repeater used for long distance telephony in 1915-20 period, 1+1 Carrier system of 1922 vintage, 3channel, 8channel, 12channel open wire carrier systems,terminal of Jodhpur(India) - Karachi(Pakistan) 8channel carrier system which was shut down in1965 after Indo-Pak war, repeater of Delhi-Bombay 12 channel carrier system retrieved from Mohan - a place famous for legendry bandits and dacoits of Central India, S+DX and S+4DX carrier systems of 1960s vintage 
(8) Two terminals of India's first 1800 channel microwave system of NEC make installed between Calcutta and Asansol in 1965,terminals of 300 channel water cooled klystron microwave system for short haul routes, terminals 30/60/120 channel digital UHF systems for end radio links 
(9) High frequency high power transmitter and receiver used for communication links to remote and distant places before the advent of sattelite communications
(10) Very Small Aperture Satellite terminal for low traffic links to remote places
(11) Power plant equipment like motor - generator sets and their control panel, batteries of various types e.g. large open type lead acid cells, maintenance free battries, modern battries for cell phones and similar applications
(12) collection showing development of active components from very large sized vacuum tubes to magnetrons,amplitrons,TWTs,transistors, VVLSI etc. There is one model of transistor developed by Shockley et al.
(13) collection of magnetic materials like ferrite pot cores, rods, beads etc
(14) collection of wires of different types e.g.bare iron and copper wires of various gauges, ACSR wires, copper weld copper coated wires, enamelled copper wires, litz wires
(15) underground cables of various types including copper cables, coaxial cables, optical fibre cables, cable pressuring equipment etc
(16) line construction equipment e.g. poles of various types, line brackets,saddles,stalks, U clamps, cast iron sockets
(17) model of Indo-USSR troposcatter link
(18) models of Indian communication satellites (INSAT) 
(19) collection of telephone instruments of 
various types
20) cast iron PCO booth, cast in the UK in 1898 
(21) 900 kg bronze gong of the clock tower of Simla Telegraph Office. It is of 1880 vintage.
(22) office table of Sir C. V. Raman, 1930 Physics Nobel Laurate along with his office ceiling fan. It is of the period when he worked with P&T Audit in early 1920s
(23) chair of Mr. S. N. Bose who was a co-scientist of Albert Einstien and discovered atomic particle -boson
(24) Autographed 1945 Wireless World article of Arthur C Clark along with his message
(25) photographs of eminent inventors, scientists, discoverers etc
(26) photographs of important telecom installations in India and world
(27) stamps and coins reletated to telecomms
(28) books, notes, documents related to early telecomms in India
(29) model of the office of Captain Sleeman who wiped-out thuggery in India in 1838-52 period. He used this building to try and punish the thugs. He even hanged them to death from thick wooden beams of his office building. Later-on , this building housed Jabalpur Telegraph Office, one of the earliest in India. It is also the geographical centre of un-divided India.
(30) Bradma mchine which was used to print addresses on the telephone bills
(31) photo-copying machine of 1972 vintage. It was the first such machine made in India..
(32) collection of small computers including ZX 81, ZX spectrum , desk top and lap-top computers
(33) old accounts books inspection reports of telecom installations of pre-1900 era
(34) tools and photographs of line installation parties of bygone era
(35) collection of minerals found near Bhopal.
