Chronological Development of Telecommunication in Subcontinent

 

                  1850 : Electric Telegraph Line between Calcutta and Diamond Harbour, used by East India Company.

                  1853 : Telegraph branch under Posts and Telegraph Department, British India.

                  1853 : 4000 miles Telegraph lines constructed in India.

                  1855 : Telegraph service opened to public in India.

                  1858 : India- Srilanka Telegraph cable laid.

                  1885 : Telegraph Act.

                  1886 : Copper wire replacing iron wire.

                  1895 : Phonogram introduced in India.

                  1902 : Wireless Telegraphy started in India.

                  1914 : Postal and Telegraph departments merged in India

                  1933 : Wireless Telegraphy Act.

                  1949 : Introduction of Hindi script telegram.

                  1962 : Reconstructed as Pakistan Telegraph and Telephone Department.

                  1971 : Reconstructed as Bangladesh Telegraph and Telephone Department under Ministry of Posts and Telecommunications.

                  1975 : Reconstructed as Telegraph and Telephone Board.

                  1979 : Reconstructed as Bangladesh Telegraph and Telephone Board (BTTB) with right to issue license for telecom and wireless services.

                  1981 : Digital Telex Exchange in Bangladesh.

                  1983 : Automatic Digital ITX started in Dhaka.

                  1985 : Coinbox Telephone service introduced in Bangladesh by BTTB.

                  1989 : GENTEX Telegraph messaging service introduced in Bangladesh.

                  1989 : Bangladesh Rural Telecom Authority got license to operate exchanges in 200 upazilla.

                  1989 : Sheba Telecom got license to operate exchange is 199 upazilla.

                  1989 : Cellular mobile phone4 company Pacific Bangladesh Telephone Limited and Bangladesh Telecom got license.

                  1995 : Card Telephone service introduced in Bangladesh by BTTB and TSS.

                  1995 : Regulatory power of BTTB transferred to Ministry (MoPT).

                  1995 : 2nd and 3rd ITX installed in Dhaka.

                  1996 : Grameen Phone got cellular mobile Telephone license.

                  1996 : Telecom Malaysia International Bangladesh got cellular mobile license.

                  1998 : Telecom Policy.

                  2000 : Global Telecom Service (GTS) Telex Exchange venture with British Teleco.

                  2001 : Telecommunication Act, to establish Bangladesh Telecommunication Regulatory Commission (BTRC).

                  2002 : ICT Policy.

                  2004 : Teletalk cellular mobile launched.

                  2006 : NGN introduced in BTTB.

                  2008 (1 July) : Converted into Bangladesh Telecommunications Company Limited (BTCL) with 100% shares owned by Government and with 9 directors, headed by secretary of Ministry of Post and Telecommunications.

 

MEMORY RECALL:

Telegraph

Telex

Teleprinter

Pay-Phone: Coin Box / Cardphone

Analogue Exchanges: Magneto / Central-Battery (CB) / Electro-Mechanical-Device (EMD)

Digital: Exchanges

NEC (NEAX) / Ericsson (AXE) / Alcatel (E10) / Netus (DMS) / Italtel (LUT-Linea UT-4.100) / KT (Mercury DTS4000) /

ZTE (ZXJ) / Huawei (C&C08) / Golden-Dragon-Telecom-Technology (HJD) / Sanghai Bell (S-12)

Network: HF / VHF / Microwave / Satellite / Optical Fibre

 

WLL: Wireless Local Loop

Frame Relay

Z.25

ATM

 

 

 

 

 

 

 

 

 

Mose Code was invented by Samuel F. B. Morse and Alfred Vail in 1836.  It was originally used to convey messages through a telegraph. 

 

Phonetic Alphabet

Letter

phonetic letter

A

Alpha

B

Bravo

C

Charlie/ Canada

D

Delta

E

Echo

F

Foxtrot/ Fox

G

Golf

H

Hotel

I

India

J

Juliet

K

Kilo/ King

L

Lima/ London/ Love

M

Mike/ Mary/ Monkey

N

November/ Nancy/ Nuts

O

Oscar/ Orange

P

Papa

Q

Quebec/ Queen

R

Romeo/ Radio

S

Sierra/ Sugar

T

Tango

U

Uniform/ Union/ Uncle

V

Victor/ Violet

W

Whiskey

X

X-ray

Y

Yankee/ Yellow

Z

Zulu/ Zebra