Digium TE820 User Manual download pdf (Page 46)

Chapter 3: Configuration

Timing:

This determines how timing is handled by the card.

0 - This span is not used to determine timing. If all spans on the card

are set to 0, the card will use its internal clock as the timing source.

1, 2, 3, ... - A value greater than 0 will cause the span to attempt to

recover a clock source from the line for the entire card to use as

timing. Since only one source of timing is valid per card, this value

defines a priority that determines which span recovers a clock in the

case that multiple are defined. 1 is the highest priority span, followed

by 2, 3, and so on.

Line Build Out:

For most setups the line build out is 0.

0: 0 db (CSU) / 0-133 feet (DSX-1)

1: 133-266 feet (DSX-1)

2: 266-399 feet (DSX-1)

3: 399-533 feet (DSX-1)

4: 533-655 feet (DSX-1)

5: -7.5db (CSU)

6: -15db (CSU)

7: -22.5db (CSU)

Framing:

T1 utilizes framing set for D4 (SF) or ESF. E1 utilizes CAS or CCS.

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Digium TE820 User Manual Page 46