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T7264

U-Interface 2B1Q Transceiver

Agere -> LSI Corporation 

T7264 U-Interface 2B1Q Transceiver

Data Sheet

April 1998

K2 Interface Description (continued)

Table 7. UM1 and UM2 Octets—eoc Bits (Overview)

Octet

UM1

UM2

Octet #

5

6

DO/DI

DO/DI

DO/DI

Bit 1

a1

i5

Bit 2

a2

i6

Bit 3

a3

i7

Bit 4

dm

i8

Bit 5

i1

Bit 6 Bit 7

i2

i3

See next page.

Bit 8

i4

Table 8. UM1 and UM2 Octets—eoc Bits (Functions)

Additional details on eoc bits can be found in T1.601.

Octet

Bit #

UM1, 2 1—8, 1—4

UM1

1—3

UM1

4

UM1, 2 5—8, 1—4

Symbol

eoc

a1—a3

dm

i1—i4,

i5—i8

Name/Function

eoc Bits. The eoc bits are passed transparently from the U-interface to the

K2 interface and from the K2 to the U-interface. The transceiver maintains

the eoc information at the K2 interface until a new block of eoc information

is available.

eoc Address.

000—NT address.

001—LT to NT intermediate address.

010—110—LT to NT, decrement address and pass on.

001—101—NT to LT, increment address and pass on.

111—Broadcast address.

Data or Message Indicator.

0—Data.

1—Message.

Information. eoc channel message information.

01010000—Operate 2B+D loopback.

01010001—Operate B1 channel loopback.

01010010—Operate B2 channel loopback.

01010011—Request corrupt crc.

01010100—Notify of corrupted crc.

11111111—Return to normal.

00000000—Hold state.

10101010—Unable to comply.

Refer to T1.601 for codes which are reserved, nonstandard, or internal net-

work use.

16

Lucent Technologies Inc.

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