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4. Configuration Options
9128-A2-GB20-80 September 2002
4-35
Line Build Out (LBO)
Possible Settings: 0.0, –7.5, –15, –22.5
Default Setting: 0.0
Specifies the line build out for the signal transmitted to the network.
0.0, –7.5, –15, –22.5 – Specifies line build out in dB.
Bit Stuffing
Possible Settings: 62411, Disable
Default Setting: 62411
Determines the type of bit insertion to provide ones density requirements for data
transmitted to the network.
Display Conditions
– This option does not appear when Line Coding Format is set to
B8ZS.
62411 – Inserts a one in the data after 15 consecutive zeros are received or the density of
ones falls below 12.5%. This setting complies with AT&T TR 62411, but is not
recommended for frame relay data because it inserts errors in the data traffic.
Disable – Disables bit stuffing. Ones density is not enforced on data sent to the network.
Transmit Timing
Possible Settings: System, Interface
Default Setting: System
Allows transmit timing to be selected from either the system master clock source or from
the currently selected interface.
System – Transmit timing is derived from the current system clock source (see Table 4-5,
General System Options).
Interface – Transmit timing is derived from this interface.
NOTE: When Interface is configured, the clock must be synchronized to the system
clock source.
Network Initiated LLB
Possible Settings: Enable, Disable
Default Setting: Enable
Allows the initiation and termination of the line loopback (LLB) to be controlled by the
receipt of LLB-Actuate and LLB-Release commands from the network.
Enable – LLB is controlled by LLB-Actuate and LLB-Release commands. Receiving a
LLB-Actuate command causes the FrameSaver unit to enter a line loopback (provided an
LLB can be performed in the FrameSaver unit’s current state). Receiving an LLB-Release
command terminates the LLB.
Disable – The FrameSaver unit ignores the LLB-Actuate and LLB-Release commands.
NOTE: When disabled, the system is not in compliance with ANSI T1.403 or
AT&T TR 62411.
Table 4-6. Network Physical Interface Options (2 of 4)