Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual page 149

path ds3 description
path ds3 framing
Copyright © 2010, Juniper Networks, Inc.
Use to configure the transmit clock source for the T3 line.
Select a clock as follows:
Specify the keyword line to use a transmit clock recovered from the line's receive
data stream.
Specify the keywords internal module to use the line module's internal clock.
Specify the keywords internal chassis to use the router's clock.
You can usually accept the default option, line, to use a transmit clock recovered from
the line's receive data stream, except in rare cases such as back-to-back router tests.
When performing back-to-back router tests, configure one end of the line as internal
and the other end as line.
On a cOC3/STM1 I/O module, you can configure some interfaces with internal clock
sources and others with line clock sources. However, all interfaces with internal clock
sources must use either the router's clock or the module's clock. You cannot configure
some interfaces on the I/O module to use the router's clock and others to use the
module's clock.
To change the clock source of the interfaces on a cOC3/STM1 I/O module from the
router's clock to the module's clock or vice versa, first change the clock source of all
ports to the line setting, and then to the new internal clock setting.
Example
host1(config-controll)#path 12 ds3 1 clock source line
Use the no version to restore the default value, line.
See path ds3 clock source.
Use to assign a text description or an alias to a T3 (DS3) over channelized SONET/SDH
interface.
You can use this command to help you identify the interface and keep track of interface
connections.
The description or alias can be a maximum of 80 characters.
Use "show controllers sonet ds3" on page 155 to display the text description.
Example
host1(config-controller)#path 12 ds3 1 description boston_t3
Use the no version to remove the text description or alias.
See path ds3 description.
Use to configure the framing format for a T3 interface.
Specify c-bit parity framing or m23 multiplexer framing.
Chapter 4: Configuring Channelized OCx/STMx Interfaces
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