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National Telecom Limited
29,00 € *
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National Telecom Limited (NTC) was incorporated on June 8, 2004 for the purpose of implementing, owning and operating a fixed line network in Bangladesh. NTC was awarded a PSTN license by the Bangladesh Telecom Regulatory Commission (BTRC), and the Government of Bangladesh (GoB) to operate basic telephone services, data and broadband services in all over Bangladesh. The license was granted for a period of 20 years and is renewable prior to expiry. The authorised capital of NTC is Bangladesh Taka (BDT) 5 billion (approx US$ 73 million) divided into 50,000,000 ordinary shares of BDT 100 each. 1 US$ = 68.7 BD National Telecom, received a national license on 23 September 2007 and is one of the six PSTN operators to operate PSTN service all over Bangladesh. The license was granted for a period of 15 years and is renewable prior to expiry and NTC had to surrender all previous (four Zone) licenses. NTC also received one spot of 450 MHz and one spot of 1900 MHz frequency from BTRC.

Anbieter: Dodax
Stand: 23.01.2020
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IP Phone
29,90 € *
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An IP phone uses Voice over IP technologies allowing telephone calls to be made over an IP network such as the internet instead of the ordinary PSTN system. Calls can traverse the Internet, or a private IP Network such as that of a company. The phones use control protocols such as Session Initiation Protocol, Skinny Client Control Protocol or one of various proprietary protocols such as that used by Skype. IP phones can be simple software-based Softphones or purpose-built hardware devices that appear much like an ordinary telephone or a cordless phone. Ordinary PSTN phones are used as IP phones with analog telephony adapters (ATA).It may have many features an analog phone doesn't support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers.

Anbieter: Dodax AT
Stand: 23.01.2020
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IP Phone
29,00 € *
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An IP phone uses Voice over IP technologies allowing telephone calls to be made over an IP network such as the internet instead of the ordinary PSTN system. Calls can traverse the Internet, or a private IP Network such as that of a company. The phones use control protocols such as Session Initiation Protocol, Skinny Client Control Protocol or one of various proprietary protocols such as that used by Skype. IP phones can be simple software-based Softphones or purpose-built hardware devices that appear much like an ordinary telephone or a cordless phone. Ordinary PSTN phones are used as IP phones with analog telephony adapters (ATA).It may have many features an analog phone doesn't support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers.

Anbieter: Dodax
Stand: 23.01.2020
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H.323
35,00 € *
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High Quality Content by WIKIPEDIA articles! H.323 is an umbrella Recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point conferences. It is widely implemented by voice and videoconferencing equipment manufacturers, is used within various Internet real-time applications such as GnuGK and NetMeeting and is widely deployed worldwide by service providers and enterprises for both voice and video services over Internet Protocol (IP) networks. It is a part of the ITU-T H.32x series of protocols, which also address multimedia communications over Integrated Services Digital Network (ISDN), Public Switched Telephone Network (PSTN) or Signaling System 7 (SS7), and 3G mobile networks. H.323 Call Signaling is based on the ITU-T Recommendation Q.931 protocol and is suited for transmitting calls across networks using a mixture of IP, PSTN, ISDN, and QSIG over ISDN.

Anbieter: Dodax AT
Stand: 23.01.2020
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H.323
34,00 € *
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High Quality Content by WIKIPEDIA articles! H.323 is an umbrella Recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point conferences. It is widely implemented by voice and videoconferencing equipment manufacturers, is used within various Internet real-time applications such as GnuGK and NetMeeting and is widely deployed worldwide by service providers and enterprises for both voice and video services over Internet Protocol (IP) networks. It is a part of the ITU-T H.32x series of protocols, which also address multimedia communications over Integrated Services Digital Network (ISDN), Public Switched Telephone Network (PSTN) or Signaling System 7 (SS7), and 3G mobile networks. H.323 Call Signaling is based on the ITU-T Recommendation Q.931 protocol and is suited for transmitting calls across networks using a mixture of IP, PSTN, ISDN, and QSIG over ISDN.

Anbieter: Dodax
Stand: 23.01.2020
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Asterisk (PBX)
46,30 € *
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High Quality Content by WIKIPEDIA articles! Asterisk is a software implementation of a telephone private branch exchange (PBX) originally created in 1999 by Mark Spencer of Digium. Like any PBX, it allows attached telephones to make calls to one another, and to connect to other telephone services including the public switched telephone network (PSTN) and Voice over Internet Protocol (VoIP) services. Its name comes from the asterisk symbol. Asterisk is released under a dual license model, using the GNU General Public License (GPL) as a free software license and a proprietary software license to permit licensees to distribute proprietary, unpublished system components.

Anbieter: Dodax AT
Stand: 23.01.2020
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Voice over IP Security
50,40 € *
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Voice over IP telephony is gaining popularity quickly, and is often replacing traditional PSTN connectivity due to its low cost and easy implementation. In moving from a legacy PSTN system to a newer technology such as VoIP, security is often overlooked by vendors and users. This can present a significant problem in the corporate environment, where security in terms of both privacy and service is a key requirement. For residential users, credential theft can result in a significant annoyance, such as toll fraud or identity theft. This book focuses on attacks that compromise privacy, and details methods of detecting and mitigating these attacks. IPSec is used to ensure that signalling and media traffic are unable to be intercepted. These techniques should help administrators of networks carrying voice traffic to implement necessary measures to ensure that security and privacy remain intact. They should be particularly useful in corporate environments, where sensitive information needs to remain inaccessible to anyone other than its intended recipients.

Anbieter: Dodax AT
Stand: 23.01.2020
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Voice over IP Security
49,00 € *
ggf. zzgl. Versand

Voice over IP telephony is gaining popularity quickly, and is often replacing traditional PSTN connectivity due to its low cost and easy implementation. In moving from a legacy PSTN system to a newer technology such as VoIP, security is often overlooked by vendors and users. This can present a significant problem in the corporate environment, where security in terms of both privacy and service is a key requirement. For residential users, credential theft can result in a significant annoyance, such as toll fraud or identity theft. This book focuses on attacks that compromise privacy, and details methods of detecting and mitigating these attacks. IPSec is used to ensure that signalling and media traffic are unable to be intercepted. These techniques should help administrators of networks carrying voice traffic to implement necessary measures to ensure that security and privacy remain intact. They should be particularly useful in corporate environments, where sensitive information needs to remain inaccessible to anyone other than its intended recipients.

Anbieter: Dodax
Stand: 23.01.2020
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IP Telephony Over IUG Network
50,40 € *
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Traditional telephony last about 100 years in use as the basic voice communication because of its reliability that satisfy the normal needs. Packet switching network, especially the Internet, which rapidly spread , attract more and more applications, because of its flexibility and efficiency. One of the most important applications is VoIP, which transmit voice in the same method of transmitting data, taking into account that voice is a real time application. Once we can transmit the voice over IP network, we do not need to route calls using the expensive and large central switches of PSTN, since we can route the calls in the same manner that we route data in IP network. This is the task of the soft switch, soft switch may seem to be the counterpart of central office or PBX of PSTN network. Finally, this project outlines the overall system of VoIP communication, and then show how to implement a whole telephone system based on IP protocols. The implementation of this project will improve the telephony service and management in (IUG).

Anbieter: Dodax AT
Stand: 23.01.2020
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