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T7264

U-Interface 2B1Q Transceiver

Agere -> LSI Corporation 

T7264 U-Interface 2B1Q Transceiver

K2 Interface Description (continued)

K2 Bit Levels

Table 15. K2 Data Out (DO) Bit Levels

(+) Active = 1 (T) Transparent

(–) Active = 0 (P) Pulsing

Bit Name

B1, B2

D

RSF, TSF

RF, TF

eoc

act

dea

ps1, ps2

febe

ntm

cso

sai

uoa

nib

aib

R

nebe

xact

oof

Description

True Level

U-Interface Related

ISDN 64 kbits/s B1, B2 Octet

ISDN 16 kbits/s D Bits

Receive/Transmit Superframe

+

Receive/Transmit Frame

+

UM Bits

eoc addr, d/m, and info bits

+

Activate

+

Deactivate

–

Primary/Sec. Power Status

+

Far-end Block Error

–

NT in Test Mode

–

Cold Start Only

+

S/T Activity Indicator

+

U Only Activation

–

Network Indicator Bit

–

Alarm Indication Bit

–

Reserved

–

DS Bits

Near-end Bit Error

–

Transceiver Active

+

Out of Frame

–

Table 16. K2 Device Control (DC) Bit Levels

(+) Active = 1 (x) Either 1 or 0

(–) Active = 0

Bit Name

ccrc

istp

lpbk

afrst

ldea

xpcy

Description

Corrupt the Outgoing crc

Initiate Start-up

Loopback

Reset

Local Deactivate

Transparency

True Level

–

–

–

+

+

–

20

Data Sheet

April 1998

Reset/Idle

1

1

1

1

1

0

1

1

1

1

1

1

1

1

1

1

1

0

0

Operational

T

T

P

P

T

1

1

1

1

1

0 or 1

1

1

1

1

1

1

1

1

Reset/Idle

x

1

1

1 then x

1 then x

1

Operational

1

0 then x

1

0

0

0

Lucent Technologies Inc.

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