CTC Union EOe-1, Руководство пользователя

Страница: 14 / 44

Chapter 1. Introduction
8
1.5 System Timing Considerations
E1 link timing
The EOe-1 E1 link receive path always operates on the
receive clock. The
EOe-1
recovers the receive clock from the
received E1 link data signal. The source of the
EOe-1
E1 link
transmit clock can be selected by the user.
E1 Link Transmit Timing Settings
•
Recovery (loop back) timing :
The
EOe-1
E1 link transmit clock is locked to the recovered
receive clock. This is usually the timing mode selected for
network operation.
Figure 1.1: Recovery timing
Ethernet
Bridge
10/100Base
DSU
E1
E1
transceiver
Clock Mode 0: Recovery
TX
RX