PM8313 datasheet(74/192 Pages) PMC

74 / 192 page

PM8313 D3MX

DATA SHEET

PMC-920702

ISSUE 5

M13 MULTIPLEXER

DS2ALME:

The DS2 Alarm Enable (DS2ALME) bit allows the automatic generation of

AIS in the DS1s demultiplexed from a DS2 or G.747 stream which is in an

alarm condition. If DS2ALME is a logic 1,a DS2 or G.747 out-of-frame (OOF)

condition (i.e. immediately after 2-of-n F-bit errors where n is 4 or 5, or 3-of-4

M-frames containing M-bit errors for DS2, or immediately after 4 consecutive

framing word errors for G.747) or detection of DS2 or G.747 AIS causes each

of the associated DS1s to be replaced by an unframed all ones pattern

immediately. If DS2ALME is a logic 0, AIS can still be generated in the

demultiplexed DS1s under software control by setting the bits in the

appropriate MX12 AIS Insert Register. Note that the removal of the auto all-

ones insertion is performed upon the first DS2 M-frame or G.747 frame pulse

after the DS2 FRMR has found frame alignment.

RED2ALME:

The RED DS2 Alarm Enable (RED2ALME) bit works in conjunction with the

DS2ALME and enables detection of DS2 RED condition to be used in place

of DS2/G.747 out-of-frame in the above criteria for demultiplexed AIS

generation. When DS2ALME is set to logic 1 and RED2ALME is set to logic

1, the occurrence of OOF for 53 consecutive DS2/G.747 "M-frames" causes a

DS2 RED alarm condition and generates the DS1 AIS. When DS2ALME is

set to logic 1 and RED2ALME is set to logic 0, any occurrence of OOF

generates the DS1 AIS. If DS2ALME is a logic 0, the RED2ALME bit is

ignored.

REDO:

The RED Alarm Output Enable (REDO) bit selects the type of signal output

on the ROOF/RRED pin. If REDO is a logic 1, the DS3 RED status signal is

available on the ROOF/RRED output pin. If REDO is a logic 0, the DS3 OOF

status signal is available on the ROOF/RRED output pin.

ALTFEBE:

The Alternate Far End Block Error (ALTFEBE) bit selects the error conditions

detected to define a FEBE indication. If ALTFEBE is a logic 1, a FEBE

indication is generated in the outgoing C-bit Parity DS3 transmit stream if a C-

bit parity error occurred in the last received M-frame. If no C-bit parity error

occurred, no FEBE is generated. If ALTFEBE is a logic 0, a FEBE indication is

generated if either one or more framing bit errors or a C-bit parity error has

occurred in the last received M-frame. If no framing bit errors nor C-bit parity

errors have occurred, then no FEBE is generated.

PM8313 Datasheet(PDF) 74 Page - PMC-Sierra, Inc

PM8313 Datasheet(HTML) 74 Page - PMC-Sierra, Inc

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