CI-100E Interface converter
* An CI-100E interface converter (hereafter "converter") is intended for data transmission of the IEEE 802.3
standard (Ethernet 10BaseT specification) by means of an interface ITU-T G.703 (2048 Kbit/s).
The example of communication channel arrangement is given in fig. 1.
Fig. 1 - Example of communication channel arrangement
Principle of operation:
Data transmission in a structured E1 stream is effected with the help of a special structure - frame. Frames are transmitted continuously. Each frame is split into 32 constituent parts so called time-slots (channels). The time-slots 0 and 15 are intended for service information transmission. Arbitrary information can be transmitted in the rest of the time-slots. While Ethernet information transmission the converter buffers Ethernet data and transfers them over the time-slots selected for the Ethernet transmission. While receiving of the bitstream E1 the converter allocates those time-slots which are selected for Ethernet data, buffers them and transmits to the Ethernet 10 Base T equipment.