Clock Synchronization - Matrix Telecom SIMADO GBR42 System Manual

What's this?
This chapter gives brief idea about system clock derivation. When
data is transmitted from the system to external lines or system
receives data from the external lines, it is required that the transmitter
and receiver are properly synchronized. Otherwise intermittent, clock
slips can occur. A clock slip can generate a loss or addition of data to
the data stream.
• There are three ways of Clock Synchronization:
• Using the Data Clock.
• Using the External Clock (Clock is sent by the network on a
dedicated cable pair).
• Using the Internal Clock.
• The system does not support External Clock.
• For the SIMADO GBR42, fixed hierarchy of clock sources is
Internal, TE1 and TE2.
How it works?
• Matrix GBR42 does not support external clock.
• User should configure the gateway such that when it is connected
to the PSTN, it will extract the clock from the incoming data
whereas, if it is used to form a private network then it will use
Internal Clock.
• There are 3 clock sources for the SIMADO GBR42 which are
programmable.
• If any one port is synchronized, the SIMADO GBR42 shall select it
as clock master.
• If none of the port is synchronized out of this table, it shall give
priority to internal clock.
How to program?
Use following command to assign Priority to select the clock source
for the SIMADO GBR42:
215-Priority-Clock Source-#*
Where,
Priority is from 1 to 3, 1 is highest priority and 3 Least priority.
SIMADO GBR42 V1 System Manual

Clock Synchronization

Matrix
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