DS26401 datasheet(165/309 Pages) DALLAS

165 / 309 page

DS26401 Octal T1/E1/J1 Framer

165

Table 10-2. E1 Alarm Criteria

ALARM

SET CRITERIA

CLEAR CRITERIA

ITU

SPEC.

RLOF

An RLOF condition exist on power up prior to

initial synchronization, when a resync criteria

has been met, or when a manual resync has

been initiated via RCR1.0

RLOS

255 or 2048 consecutive zeros received as

determined by RCR2.0

In 255-bit times, at least 32 ones

are received

G.775/G.962

RRAI

Bit 3 of non-align frame set to one for three

consecutive occasions

Bit 3 of non-align frame set to zero

for three consecutive occasions

O.162

RAIS

Fewer than three zeros in two frames (512 bits)

More than two zeros in two frames

(512 bits)

O.162

RDMA

Bit 6 of time slot 16 in frame 0 has been set for

two consecutive multiframes

V52LNK

2 out of 3 Sa7 bits are zero

G.965

RRTS1

Receive Real-Time Status Register 1

0B0h + (200h x n) : where n = 0 to 7, for Ports 1 to 8

Bit #

Name

—

RRAI

RAIS

RLOS

RLOF

Default

All bits in this register are real-time (not latched).

Bit 0 / Receive Loss of Frame Condition (RLOF).

Set when the DS26401 is not synchronized to the received data

stream.

Bit 1 / Receive Loss of Signal Condition (RLOS).

Set when 255 (or 2048 if RCR2.0 = 1) consecutive zeros have

been detected at RPOS and RNEG.

Bit 2 / Receive Alarm Indication Signal Condition (RAIS).

Set when an unframed all one’s code is received at

RPOS and RNEG.

Bit 3 / Receive Remote Alarm Indication Condition (RRAI).

Set when a remote alarm is received at RPOS and

RNEG.

Bits 4 to 7 / Unused

DS26401 Datasheet(PDF) 165 Page - Dallas Semiconductor

DS26401 Datasheet(HTML) 165 Page - Dallas Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL