Configuring The Serial Idle Cycle Flag - Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual

Although the serial interface is intended for use at the default rate of 16.384 MHz,
you might need to use a slower rate if any of the following conditions prevail:
For detailed information about the relationship between signaling rate and interface
cable distance, see the following standards:

Configuring the Serial Idle Cycle Flag

By default, a serial interface on J Series routers transmits the value 0x7E in the idle
cycles. To have the interface transmit the value 0xFF (all ones) instead, include the
idle-cycle-flag
level, specifying the
To explicitly configure the default value of 0x7E, include the
with the
2.048 MHz
2.341 MHz
2.731 MHz
3.277 MHz
4.096 MHz
5.461 MHz
8.192 MHz
16.384 MHz
The interconnecting cable is too long for effective operation.
The interconnecting cable is exposed to an extraneous noise source that might
cause an unwanted voltage in excess of +1 volt measured differentially between
the signal conductor and circuit common at the load end of the cable, with a
50-ohm resistor substituted for the generator.
You need to minimize interference with other signals.
You need to invert signals.
EIA-422-A, Electrical Characteristics of Balanced Voltage Digital Interface Circuits
EIA-423-A, Electrical Characteristics of Unbalanced Voltage Digital Interface Circuits
statement at the
option:
ones
[edit interfaces interface-name serial-options]
idle-cycle-flag ones;
option:
flags
[edit interfaces interface-name serial-options]
idle-cycle-flag flags;
Chapter 12: Configuring Serial Interfaces
[edit interfaces interface-name serial-options]
Configuring the Serial Idle Cycle Flag
hierarchy
idle-cycle-flag statement
277