Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 601

Understanding Circuit Emulation PIC Clocking Features
All Circuit Emulation PICs support the following clocking features:
This feature set is useful for aggregation in mobile backhaul applications.
NOTE: The primary reference source (PRS) of the clock recovered from one interface
may not be the same as that of another TDM interface. There is a limitation on the
number of timing domains that can be supported in practice.
Understanding T1 and E1 Options Exceptions on Circuit Emulation PICs
The 12-port T1/E1 Circuit Emulation PICs support T1 and E1 options with the following
exceptions:
External clocking—Also known as loop timing. Clock is distributed via TDM
interfaces.
Internal clocking with external synchronization—Also known as external timing
or external synchronization.
Internal clocking with PIC-level line synchronization—The PIC s internal clock
is synchronized with a clock recovered from a TDM interface local to the PIC.
,
bert-algorithm bert-error-rate
CE1 configurations only.
framing is supported for CT1 or CE1 configurations only. It is not applicable in
SAToP configurations.
is supported in CT1 configurations only.
buildout
line-encoding is supported in CT1 configurations only.
and
loopback local loopback remote
only.
is not supported. It is not applicable in SAToP configurations.
loopback payload
idle-cycle-flag is not supported. It is not applicable in SAToP or ATM configurations.
is not supported. It is not applicable in SAToP or ATM configurations.
start-end-flag
invert-data is not supported. It is not applicable in SAToP configurations.
is not supported.
fcs32 fcs
timeslots is not supported. It is not applicable in SAToP configurations.
is not supported. It is not applicable in SAToP or ATM
byte-encoding nx56
configurations.
Understanding Circuit Emulation PIC Clocking Features
Chapter 26: Circuit Emulation PICs Overview
, and options are supported for CT1 or
bert-period
are supported in CE1 and CT1 configurations
is not applicable in SAToP or ATM configurations.
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