T1 Network Interface

Models: and 9820-45M 9123 9623 9783 9720 9820-2M 9128 carrier-mount 9128 standalone 9788 9820-8M

3. Configuration Options

FrameSaver Models 9123, 9126, and 9128 have a T1 network interface.

Table 3-7. T1 Network Physical Interface Options (1 of 4)

Line Framing Format

Possible Settings: D4, ESF

Default Setting: ESF

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.

Line Coding Format

Possible Settings: AMI, B8ZS

Default Setting: B8ZS

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.

Line Build Out

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.

3-18

December 2002

9000-A2-GB31-00

and 9820-45M, 9123, 9623, 9783, 9720 specifications

The Paradyne 9820-8M, 9788, 9128 standalone, 9128 carrier-mount, and 9820-2M are critical components in telecommunications networks, designed to enhance data transmission and improve connectivity. Each model offers unique features and capabilities that cater to various requirements in both enterprise and service provider environments.

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