System Clock Source Priority List

In this user interface, you can query, modify and set the priority list of clock sources, select the external clock source mode, and select the tributary board for tributary clock source.

Navigation Path

In the NE Explorer, click the NE and choose Configuration > Clock > Physical Clock > Clock Source Priority from the Function Tree. Click the System Clock Source Priority List tab.

Parameter Description

**Table 1** Parameters for the system clock source priority list
Parameter	Value	Description
Clock Source	For example: Internal Clock Source	The clock sources in the list used by the current NE have different priorities according to their sequences, with the uppermost clock source having the highest priority.
External Clock Source Mode	2 MHz, 2 Mbit/s Default: 2 Mbit/s	Selects the external clock source mode. Only the input external clock source can be set.
Synchronous Status Byte	SA4, SA5, SA6, SA7, SA8	Selects the byte in the external clock signal used to transmit the synchronization status message. Only the external clock source input in 2 Mbit/s mode can be set.