ADTRAN TSU 600, User Manual

Page: 25 / 133

Chapter 1. Introduction
61200.076L2-1 TSU 600 User Manual
13
TSU 600 CLOCK SOURCES
The TSU 600 is operable from various clock sources
permitting it to perform properly in many different
applications. The network interface clocking options
are set by using the clocking options set by using the
Network (NI) Configuration menu options. The
following clock source options are available:
• Network
• DTE timing
• Internal timing
• Secondary timed
• Normal (CSU)
The clock option selected always designates the clock source
for transmission. Clocking necessary for receiving data is
always recovered from incoming data.
Network Timed
The network is the source of timing. The received data
clocking is looped back to the network where it is used
to determine the transmission timing. This option is
also referred to as
loop timed as the transmission clock
is derived from the received clock. See Figure 1-5.
1 2 3
OPTION SLOTS
NETWORK
INTERFACE
4 5 6
TIMING SOURCE
SECONDARY
INTERFACE
Figure 1-5
Network Timed Clock Source