XRT86VL34 datasheet(44/156 Pages) EXAR

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XRT86VL34

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

REV. V1.2.0

TABLE 25: CUSTOMER INSTALLATION ALARM GENERATION REGISTER (CIAGR)

HEX ADDRESS: 0Xn11C

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

[7:4] Reserved

Reserved

[3:2] CIAG

R/W

CI Alarm Transmit (Only in ESF)

These two bits are used to enable or disable AIS-CI or RAI-CI gen-

eration in T1 ESF mode only.

Alarm Indication Signal-Customer Installation (AIS-CI) and Remote

Alarm Indication-Customer Installation (RAI-CI) are intended for use

in a network to differentiate between an issue within the network or

the Customer Installation (CI).

AIS-CI

AIS-CI is an all ones signal with an embedded signature of

01111100 11111111 (right-to left) which recurs at 386 bit intervals in-

the DS-1 signal.

RAI-CI

Remote Alarm Indication - Customer Installation (RAI-CI) is a repeti-

tive pattern with a period of 1.08 seconds. It comprises 0.99 sec-

onds of RAI message (00000000 11111111 Right-to-left) and a 90

ms of RAI-CI signature (00111110 11111111 Right to left) to form a

RAI-CI signal. RAI-CI applies to T1 ESF framing mode only.

00/11 = Disables RAI-CI or AIS-CI alarms generation

01 = Enables unframed AIS-CI alarm generation

10 = Enables RAI-CI alarm generation

[1:0] CIAD

R/W

CI Alarm Detect (Only in ESF)

These two bits are used to enable or disable RAI-CI or AIS-CI alarm

detection in T1 ESF mode only.

00/11 = Disables the RAI-CI or AIS-CI alarm detection

01 = Enables the unframed AIS-CI alarm detection

10 = Enables the RAI-CI alarm detection

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