Configuring Channelized Data

Line Coding Type (continued)

Description:

Selects type of zero suppression used on the T1 link.

B8ZS: Consecutive 8 zero suppression (clear channel)

B7ZS: Stuffing: (56k x N)

AMI: Alternate mark inversion (user equipment must maintain density)

Transmit Clock

Range:

INT, REC

 

 

Default:

INT

 

 

 

Description:

 

Selects the source of transmit clock.

 

 

 

• INT: Internal Oscillator

 

 

 

• REC: Received Timing

 

 

 

Note

 

 

 

 

 

 

 

 

Only one T1 port on the card can be selected for REC timing.

 

 

 

 

Line Build Out

Range:

0 to 4

 

 

 

 

Default:

0

 

 

 

Description:

Select the Line Build Out to match the physical interface. For a

 

DSX interface, select the number based on the cable length:

 

• 0:

0 to 133 ft

 

• 1:

134 to 266 ft

 

• 2:

267 to 399 ft

 

• 3:

400 to 533 ft

 

• 4:

534 to 655 ft

 

For a DS1 interface, select the number based on the signal level:

 

• 0:

0 dB

 

• 1: -7 dB

 

• 2: -15 dB

 

• 3: -22 dB

 

• 4: Invalid for DS1 interfaces

 

 

 

Facility Data Link

 

 

 

Range:

None, ANSI, ATT

 

 

 

Default:

None

 

 

 

Description:

Describes the use of the facility data link channel. Appears only if

 

ESF is selected as Line Framing Type.

 

 

 

5-8

Channelized Data

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Image 120
3Com S27x, S26x, S24x installation manual Transmit Clock, Int, Rec, Line Build Out, Facility Data Link