XRT86VL34 datasheet(24/156 Pages) EXAR

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XRT86VL34

QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

REV. V1.2.0

3-2

Transmit AIS

Pattern

Select[1:0]

R/W

Transmit AIS Pattern Select[1:0]:

These two bits permit the user to do the following.

1. To select the appropriate AIS Pattern that the Transmit T1 Framer block will

transmit to the remote terminal equipment, and

2. To command (via Software Control) the Transmit T1 Framer block to transmit

that particular AIS Pattern to the remote terminal equipment, as depicted below.

NOTE: For normal operation (e.g., to configure the Transmit T1 Framer block to

transmit normal T1 traffic) the user should set this bit to “[X, 0]”

1-0

AIS Defect

Declaration

Criteria [1:0]

R/W

AIS Defect Declaration Criteria[1:0]:

These bits permit the user to specify the types of AIS Patterns that the Receive T1

Framer block must detect before it will declare the AIS defect condition.

TABLE 5: ALARM GENERATION REGISTER (AGR)

HEX ADDRESS: 0Xn108

BIT

FUNCTION

TYPE DEFAULT

DESCRIPTION-OPERATION

AISG[1:0]

TYPES OF AIS PATTERNS TRANSMITTED

00/10

Disable AIS Alarm Generation

The Transmit T1 Framer block will transmit “normal” T1

traffic to the remote terminal equipment.

Enable Unframed AIS Alarm Generation

Transmit T1 Framer block will transmit an Unframed All

Ones Pattern, as an AIS Pattern.

Enable Framed AIS Alarm Generation

Transmit T1 Framer block will transmit a Framed, All

Ones Pattern, as the AIS Pattern.

AISD[1:0]

AIS Defect Declaration Criteria

00/10

AIS Detection Disabled

AIS Defect Condition will NOT be declared.

Enable Unframed and Framed AIS Alarm Detection

ReceiveT1 Framer block will detect both Unframed and

Framed AIS pattern

Enable Framed AIS Alarm Detection

Receive T1 Framer block will detect only Framed AIS pat-

tern

XRT86VL34 Datasheet(PDF) 24 Page - Exar Corporation

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