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2. Basic Configuration
9000-A2-GB31-00 December 2002
2-7
Network 1 Line Framing Format (9123, 9126, 9128)
Possible Settings: D4, ESF
Default Setting: ESF
For units with a T1 network interface, specifies the framing format for transmitted and
received signals on the T1 network interface.
D4 – Uses D4 framing format.
NOTE: This setting is not recommended by network carriers. False yellow alarms may
occur after traffic has been running and the channel returns to idle, or when there is
light traffic when other settings are selected. ESF format does not create this problem.
ESF – Uses Extended Superframe framing format.
Network 1 Line Coding Format (9123, 9126, 9128)
Possible Settings: AMI, B8ZS
Default Setting: B8ZS
For units with a T1 network interface, specifies the line coding format for the network
interface.
AMI – Uses Alternate Mark Inversion (AMI) line coding format.
B8ZS – Uses Bipolar 8 Zero Substitution (B8ZS) line coding format.
Network 1 Line Build Out (9123, 9126, 9128)
Possible Settings: 0.0, –7.5, –15, –22.5
Default Setting: 0.0
For units with a T1 network interface, 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.
Network 1 Line Build Out (9520, 9520-ILM)
Possible Settings: Short, Long
Default Setting: Short
For units with a T3 network interface, specifies whether a line equalization filter is
activated to simulate a longer cable.
Short – The equalization filter is activated. Use this option for network cables less than
100 feet long.
Long – The equalization filter is not activated. Use this option for network cables 100 feet
or longer.
Port 1 Line Build Out (9520-ILM)
Possible Settings: Short, Long
Default Setting: Short
For units with a T3 data port interface, specifies whether a line equalization filter is
activated to simulate a longer cable.
Short – The equalization filter is activated. Use this option for DTE cables less than 100
feet long.
Long – The equalization filter is not activated. Use this option for DTE cables 100 feet or
longer.
Table 2-1. Easy Install Configuration Options (4 of 7)