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Create your resume on Bikroy. Sundarban is the pioneer of courier and parcel services in Bangladesh. Telephone and Fax. Robi Customer Service jobs circular part time jobs for student provide by our website. Page-2 West Sholoshohor Ward, Chattogram - bpropery. West Sholoshohor Ward, Chattogram. The Mobile Phone Company has achieved a huge space by providing low budget with highest features phones. Now this job circular also available on my website. Ashraful Kabir was also present on the occasion. The Bangladesh government initially owns all shares of BTCL but it would offload shares in the next one year for public.
BTCL has a total of 12, officials and staffs. BTCL provides land-line telephone services in the urban areas, domestic long-distance calling and international services. In , Bangladesh Government issued a number of PSTN licenses but they were barred to provide service in the lucrative Dhaka market which account for majority of the nationwide market. This monopoly of BTCL was broken when 6 other operators started to receive their licenses from Telephone operating work in Federal agencies requires knowledge of telephone regulations and procedures and skill in operating telephone equipment and lines to route incoming and outgoing calls.
It requires the use of telephone courtesy and tact in dealing with a diversity of callers, sometimes under very difficult and stressful circumstances.
The work also requires speed and accuracy, and in some locations it requires observing strict security measures. Telephone operators typically perform combinations of some or all of the following tasks: operating a console telephone switchboard; placing and receiving local calls; placing and receiving regular and special long distance calls over commercial circuits, timelines, or other systems and networks, such as a wide area commercial system, a military system, a civilian Federal system, or a Federal overseas exchange; providing organizational information to callers using computerized or printed directories; keeping records of calls for computing charges; providing primary routing or alternative routing service for high priority calls; handling calls of varying priority and preempting circuits if necessary; keeping statistics on system use to inform managers of trends concerning capacity and utilization; and Operating associated equipment, such as radios, alarms, paging systems, and secures voice equipment.
The telephone network had its beginnings in the late s. The entire network, which is referred to as the plain old telephone system POTS , was originally an analog system using analog signals to transmit voice. With the advent of computer era, the network in the s began carry data in addition to voice. During the last decade, the telephone network has undergone many technical changes.
The network is now digital as well as analog. The telephone network has several levels of switching offices such as end offices, tandem offices, and regional offices.
Telegraph or Telegram. Fax and other related facilities. Prepaid calling card system. A central office CO is the physical building used to house inside plant equipment including telephone switches, which make telephone calls "work" in the sense of making connections and relaying the speech information. The term exchange area can be used to refer to an area served by a particular switch, but is typically known as a rate center or wire center in the telecommunications industry local calling areas, in which it is not necessary to pay a long-distance rate, typically cover more than one rate center even in metropolitan and small metropolitan areas.
The exchange code or central office code often called the prefix by the public refers to the first three digits of the local number NXX , though most non-rural exchanges have more than one code or prefix. These are: I. It is the world's fourth-largest mobile phone manufacturer measured by unit sales and the world's fifth-largest telecoms equipment maker measured by revenues.
There are various types of cards that are used in ZTE exchange. This is used for internet purpose. There are connections and bandwidth can be used maximum 1 MB per sec.
It uses S7, R1, and R2 signaling channel. But it prefers R1 channel.
PEPD card It is used for dial tone purpose. MP card Main Processor All the calls are processed and stored in the computer hard disk through main processor. It process call duration, call charge, call waiting, call forwarding etc. ASIG card It is mainly used for the call establishment. It also performs dial tone, ring tone etc. There are 24 line channels. Each card provides dial tone, busy tone, ring tone etc.
FASL card If there is any fault then this card is used for communication. It is known as the distribution card.
TAX card Telecommunication Exchange Tax card is like a distributor which sends the total signal in a desired bandwidth. Power card Supplies power to the rest of the cards. It provides services like billing system, observing internet connection, mailing and communication system. It has a mother server. Under this exchange subscribers are served.
There are 16 subscribers in each card so from the 8 cards there are subscribers are served in one rack. RNGF card It is known as ringing and signaling card. When one subscriber uses the local exchange then the RNGF card sends a dial tone to another subscriber that is in the same exchange. That means it controls subscribers in one rack. MCUG card It is known as power card. GTU card It is like a sub exchange. It can serve subscribers. When a subscriber wants to call from differ- 5. In the PCM card there is 32 time slot. These are: 1. Direct Communication 2.
Microwave Link 3. Optical Fiber Link 1. Direct Communication In direct communication the subscribers that are communicating with each other must remain in the same exchange. Primary 2. Secondary From the cable chamber the cable comes to the cabinet through duct, main hall etc. From MDF to cabinet primary cable are used. Primary cable may be to pair. The secondary cable is approximately twice of primary cable.
That means if the primary cable is pair then the secondary cable is pair. In Shanghai china Bell cable, there are five main colours for every pair. But difference in colour. There is a pair of cable for a subscriber. These cables are connected to the horizontal section in the MDF. In the horizontal section the number and the position of the subscriber number are fixed.
Then the numbers are connected to the vertical section of the MDF through jumper wire. Then the connections are connected through a fuse. If a user wants to use voice and data at a time that means internet connection then the subscriber needs an extra connection that serves voice and data at a time.
Here 1 channel is used for 24 users. When the pair of cable comes from cabinet to DP the DP distribute this pair of line to the subscriber through drop wire. There is co-axial cable, optical fiber cable are used here. Then it rectifies into DC voltages 8.
In the rectifier the single face is used V and the phase to phase is V. The rectifier is a 3 phase connection and the input voltage supply is V. It supplies the DC voltage to the exchange and charges the battery at a time. In the rectifier for this purpose, step down transformer are used. The positive terminal of the rectifier is done as earthing and the negative terminal are connected to the exchange.
There are 24 battery connected with each other. Each cell is 2. The Battery is charged at Here hydrometer is used for measuring the liquid substance of the battery. The amount of Sulfuric Acid and Water is When the PDB line is failed then the battery supplies voltage to the exchange automatically. Thus it protects exchange from losing any information. They are very similar. In the PDH the channels are used by the process 2, 4, 8, 16, 32, and 62 serially. But in the SDH the 64 channels are used at a times. Here STM1 means 64 E1 line.
From 64 line, 1 line is used for synchronization rest of the line are used for speech. This part of the radio spectrum ranges across frequencies of roughly 1. These correspond to wavelengths from 30 centimeters down to 1. A microwave link is a communications system that uses a beam of radio waves in the microwave frequency range to transmit information between two fixed locations on the earth.
They are crucial to many forms of communication and impact a broad range of industries.