Proses Multiplexing pada Format Transmisi Digital E1

E1 atau sirkuit E-1 (Inggris: E-carrier) adalah nama format transmisi digital dengan 30 kanal suara digital berkecepatan 2,048 megabit per detik. E1 merupakan standar yang dipakai di Eropa dan Indonesia

Saluran ini berbentuk saluran telepon khusus dan digunakan pada awalnya untuk sambungan trunk antar sentral telepon, namun sekarang mulai banyak disewakan oleh perusahaan telekomunikasi untuk jalur komunikasi data.

Frekuensi Sampling yang diterapkan pada E1 adalah 8 kHz
ada 32 Timeslot pada E1
1 Timeslot berisikan 8 bit
Timeslot1 untuk Sinkronisasi
Timeslot16 untuk Signaling

karena frekuensi standar yang digunakan adalah 8kHz, maka periode pada setiap timeslot adalah 1/frekuensi

T=1/8kHz
T=125 mikro detik

karena 1 timeslot berisikan 8 bit, maka dalam 1 time slot memiliki kecepatan penyaluran data 8bit/125mikro detik =0.064 x 10kbps = 64 Kbps

Jadi kecepatan untuk sebuah E1= 32 slot x 64 kbps = 2048 kbps = 2.048 Mbps.

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Or E1 circuit E-1 (UK: E-carrier) is the name of a digital transmission format with 30-speed digital voice channel 2.048 megabit per second. E1 is the standard used in Europe and IndonesiaThese channels form a special telephone line and used at first for the trunk connection between telephone exchange, but now a lot leased by telecommunications companies for the data communication path.




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