ADTRAN 1202076L2#DC, 1202076L1#DC user manual TSU 600 Clock Sources, Network Timing

Chapter 5. Configuration Menu

TSU 600 Clock Sources

The TSU 600 is operable from various clock sources, permitting it to per- form properly in many different applications. The network interface timing mode is set by using the Network (NI) Configuration menu op- tions. The following options are available:

•Network Timing

•DTE Timing

•UBR1TE

•Internal Timing

•Secondary Timing

•Normal (CSU) Timing

The selected clock option always designates the clock source for trans- mission. Clocking necessary for receiving data is always recovered from incoming data.

Network Timing

The network is the source of timing. The received data clocking is looped back to the network, where it is used to determine the transmis- sion timing. This option is also referred to as loop timed as the transmis- sion clock is derived from the received clock. See Figure 5-2.

NETWORK

1 2 3 4 5

INTERFACE

TIMING SOURCE

OPTION SLOTS

6

SECONDARY

INTERFACE

Figure 5-2.Network Timed Clock Source

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