"E14, E14A" devices are designed for cryptographic protection of high-speed confidential information streams transmitted over duplex cable, fiber, radio-relay and satellite communication channels of digital mul-tiplexing systems like PCM.

Information stream parameters at device input and output:
Information kind – digital information transmitted at: "E14" - 2.048 Mbit/s
"E14A" - 8,448 Mbit/s
Interface - ITU-T G703
Cycle structure: at station side - "E14&" - in compliance with ITU-T G704
"E14-A" - in compliance with ITU-T G704, G742
Data coding - HDB-3
Line impedance - "E14" - 120 Ohm symmetric (twisted pair)
"E14A" - 75 Ohm coaxial cable
Input level - 0 to -6dB

Encryption and key system:
Cryptosynchronization - automatic when switching on or in case of communication disturbance
Key system - composition of a long-term key and of a key according to public key distribution algorithm
Long-term key life - 3 months
Key length is 256 bits
Key set power - 1077
Key information download is performed using УС-К-1 small-sized portable reading device
Electronic key carrier - like DATA KEY element (1634ДК3)
Check:
Built-in and independent check using loops at line side and user side