Paradyne 9126, CSU, DSU manual Network Physical Interface Options 2, Bit Stuffing, Transmit Timing

4. Configuration Options

Table 4-6. Network Physical Interface Options (2 of 4)

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.

9128-A2-GB20-80 September 2002 4-35