Setting The Bit Position For Transmitting Bits Clock Source Information; Configuring Ssm Levels For The Reference Source - H3C S9500 Series Operation Manual

Operation Manual – Clock Monitoring
H3C S9500 Series Routing Switches

1.5.2 Setting the Bit Position for Transmitting Bits Clock Source Information

The bits for transmitting Bits clock source information can be configured as sa4, sa5,
sa6, sa7 and sa8. They are 5 bits in timeslot 0 of the even frame in a multi-frame as
specified by ITU-TG.704 CRC4. The network administrator can choose one from the
five bits to carry SSM information.
Follow these steps to set the bit for transmitting Bits clock source information:
Enter system view
Set the bits for
transmitting the Bits clock
source information

1.5.3 Configuring SSM Levels for the Reference Source

Follow these rules to manually set the SSM level for the clock source:
For the line clock source, the SSM level configured is that of the clock source.
For Bits clock source, if the input signal is a 2048 kbps (E1) signal and the clock
forcessm off source is executed, the clock source adopts the SSM level derived
from the input signals and the SSM configured is omitted.
For Bits clock source, if the input signal is a 2048 KHz signal or a 2048 kbps signal
and the clock forcesssm on source command is executed, the clock source
adopts the SSM level configured.
Follow these steps to set the SSM level:
Enter system view
Set the SSM level of the
reference source
Note:
The reference source with the SSM level being DNU cannot be used as a clock source.
Therefore, it does not participate in clock source switch when the clock monitoring
module works in auto mode.
To do...
system-view
clock sa-bit { sa4 | sa5 |
sa6 | sa7 | sa8 } source
source-number
To do...
system-view
clock ssm { dnu | lnc |
prc | sets | tnc |
unknown } source
source-number
Chapter 1 Clock Monitoring Configuration
Use the command...
Use the command...
1-6
Remarks
—
Optional
sa4 is the default bit for
transmitting the Bits clock
source information.
Remarks
—
Required
By default, the SSM level
of all reference sources is
unknown.