31
12
2007
GENERALIZED SYSTEM OF THE EXCHANGES AND SERVERS
The voltage on the voice information of the telephone lines is on the order of 250 MV. During the conversation, this is about 5-10 V DC. The current on the lines is about 20-100 mA. The voltage on the opened circuits and the voltage on the lines when there is no conversation on it were first 24V. But now these voltages are 48V.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
I have found a report about Turktelekom which is written by O. Hasdeniz. He has performed his EE 300 Summer Practice in Turk Telecommunication. I want to share that document with you. And i’m sure he will be a great engineer int he future.
For nearly 165 years has Turk Telecom been working to supply modern communication opportunities to the subscribers. This effort is continuing today based on the same ideal. With the aim of providing modern technologies, Turk Telecom directed itself to international goals from national goals with its customer-oriented approach and qualified services. Turk Telecom is one of the biggest companies in the world, having the information and experience well enough to compete in the national and international communications markets. It is a decentralized company which has one general directorate and 81 administrative provincial directorate, one for each administrative provincial.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
The 21st Century appears to be an increasingly benevolent era, particularly for telecommunications products and services. Consumers and businesses are being offered an ever widening range of goods, for a ticket prize of zero. Or are they?
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
WiMAX (Worldwide Interoperability for Microwave Access) is a new standard that lean on the IEEE’s 802.16 wireless communication standard specification and it provides services to faster and wider areas when it is compared with 802.11 group standards (WiFi).Especially it is expected that it will provide wideband internet services to the areas that cable and DSL services cannot reach. WIMAX presents lots of advantages compared with other wireless technologies. WIMAX multi road choice and the property of distribution of delay makes it present a good perfonnance even it is out of the view point of user’ base station.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
It is a very positive issue that the number of universities has been increasing, since they support acedemical works and provide the opportunity to raise university graduate staff. Howe-
ver, after graduation we are mostly to face with a new trouble: Insufficient job opportunuties.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
When Turkey succeeds turning such potential absolutely into kinetic, it will acquire the real advantage then. Homever you talked with in recent years, he/she would say that having young population is an important advantage for Turkey. Is it really true? Of course, it is easily seen that young population is an undeniable advantage compared to the senescent European continent and its problems arising as a result of this. Unfortunately, this advantage still exists just as a potential. When Turkey succeeds turning such potential absolutely into kinetic, it will acquire the real advantage then.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
When someone with some experience using wireless networks hears the term called Wireless LAN, the first thing that comes to his / her mind is IEEE (International
Electrical and Electronics Engineers) 802.11 or Wifi. In reality we can assume that this technology has started when the first Wireless LAN standard was accepted by 802.11 commitee. It is quite hard to believe but Wireless LAN speed has increased 150 times since it was first introduced, reaching up to 300 Mbps from 2 Mbps.
Read the rest of this entry »
Comments : No Comments »
Categories : telecom_en
31
12
2007
>>Here is a article from telekomdunyasi. Its nice…
Hello friends,
Beginning from this month, I will try to be with you and inform you about digital signature, mobile digital signature developments
to the best of my ability. I would be glad if you ask what you want to learn about this subject through my e-mail address given below in order to conduct the conversation more efficiently.
Read the rest of this entry »
Comments : 1 Comment »
Categories : telecom_en
25
12
2007
Bir önceki postta gösterilen devrede kullanılan pic 16f877 ye ait PicC ile hazırlanmış program kodları. Malesef Pic 16f877 sınırlı program belleginden dolayı protokol sayısı sınırlı kalmıstır. Ancak cihazın Epromu kullanılarak cok sayıda protokol desteklenebilir. PicC kodları yine hi-tech firmasına ait hi-tide arayuzunde yazılmıstır.
Read the rest of this entry »
Comments : No Comments »
Categories : Kumandan beta
25
12
2007
Bu genel bilgiler ışığında çok modlu, birden fazla cihazı kumanda edebilen ve kolayca öğrenebilir hale getirilebilecek bir devre şeması şekilde gösterilmektedir. Aşağıdaki resimde devreye ait sinyal çıkışları gözlenebilir…
Read the rest of this entry »
Comments : No Comments »
Categories : Kumandan beta