ADTRAN T3SU 300 User Manual download pdf (Page 49)

Chapter 3. Configuration

61202217L1-1C T3SU 300 User Manual 49

FRAMING

Select the framing format for each individual DSX-1 interface. The

default setting is

ESF. Select ESF if your DTE device is configured for

Extended Superframe framing. Select

D4 if your DTE device is

configured for D4 framing. Select

AUTO to allow the interface to detect

the framing type (ESF or D4) automatically. When in A

UTO mode, the

selected interface toggles between ESF and D4 approximately every ten

seconds until it detects valid framing.

Note: D4 is equivalent to superframe format (SF).

LINE CODING

Set the line code for each individual DSX-1 interface to match the

connected DTE device. Three choices are available: B8ZS, AMI, and

AMI

W/STUFFING (AMI coding with bit stuffing).

LINE LENGTH Set the line length for each DSX-1 interface according to the distance

from the T3SU 300 to your DTE device. Set to 7.5 dB if the attached

DTE device only supports DS-1 levels.

DSX-1 TIMING

OURCE

For each Quad DSX-1 card pair (the near- and far-end Quad DSX-1

cards), there must be only one source of timing. The available timing

sources are described below:

DS3: The timing for both the near- and far-end Quad DSX-1 cards is

derived from the DS3 interface. All DTE devices connected to the

DSX-1 interfaces must be slave timed since both cards source the timing

reference derived from the DS3. Both the near- and far-end units must

be set to DS3.

REMOTE: The timing source for the Quad DSX-1 card is derived from

the far-end Quad DSX-1 card. Use this mode if the far-end card has a

DSX-1 TIMING SOURCE configuration of DSX-1 #1, DSX-1 #2, DSX-1 #3,

or DSX-1 #4.

DSX-1 #X (x is 1,2,3, or 4): The timing source for the Quad DSX-1 pair

is derived from one of the four DSX-1 interfaces. When configured in this

manner, one of the DSX-1 interfaces is slaved to the DSX-1 interface

from your DTE. The remaining three DSX-1 interfaces, if enabled,

source the timing as derived from the slaved port. The far-end DSX-1

interface must be configured for R

EMOTE.

Note: If more than one Quad DSX-1 card is installed, each card can

have a different timing source configuration.

APPLY SETTINGS

Select this field after making all configuration changes for the selected

port. The changes are then applied to the unit immediately.

Table 3-3. DSX-1 Interface Port Configuration Selections (Continued)

Selection Description

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 140 141

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ADTRAN T3SU 300 User Manual Page 49

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