TABLE 8. Codes for SC1, SC2 and Q Channel Messages with 3X Checking Enabled

NT-to-TE

TE-to-NT

SCI Messages

Received at TE

Number of

Repetitions

Received at NT

Number of

Repetitions

S11

S12

S13

S14

before MFR1 INT

Q1

Q2

Q3

Q4

before MFR1 INT

Idle (NORMAL)

0000

3

1111

3

LP Loss-of-Power

1111

1

0000

1

Indication

STP Self Test Pass

0010

3

————

—

STF Self Test Fail

0001

3

————

—

ST Self Test Request

————

—

0001

3

(Note 15)

STI Self Test Indication

0111

3

————

—

FECV Far End Code

1110

1

—

—

Violation

DOI Disruptive Operation

0011

3

—

—

Indication

DTSE-IN

1000

1

————

—

DTSE-OUT

0100

1

————

—

DTSE-IN&OUT

1100

1

————

—

Loopbacks

LB1 Request

————

—

0111

3

LB1 Indication

1101

3

————

—

LB2 Request

————

—

1011

3

LB2 Indication

1011

3

————

—

LB1/2 Request

————

—

0011

3

(Note 16)

LB1/2 Indication

1001

3

————

—

Loss-of-Received-

Signal

1010

3

————

—

Indication

Unassigned

All Other Codes

1

All Other Codes

1

Received at TE

Number of

Repetitions

before MFR2 INT

S21

S22

S23

S24

All SC2 Messages

All Codes

3

Note 15: The code “0001” will be received by an NT1 when ST Request and any other code (except LP) is sent simultaneously by two or more TEs on a Passive

Bus.

Note 16: The code “0011” will be received by an NT1 when the LB1 and LB2 requests are transmitted by two different TEs (NT2s) on a Passive Bus.

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