ADTRAN user manual TSU 600 Clock Sources, Network Timed Clock Source

Chapter 1. Introduction

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.

NETWORK

1 2 3 4 5

INTERFACE

TIMING SOURCE

OPTION SLOTS

6

SECONDARY

INTERFACE

Figure 1-5

Network Timed Clock Source

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