PM5366-PI datasheet(120/267 Pages) PMC

120 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

108

affect the state of bit 8 of V5 and (if ERDI is set) bit 5 of Z7. The contents of the

SONET/SDH Master Tributary Auxiliary Remote Defect Indication Control

bit 6 of Z7 if ERDI.

Alternatively, the TRAP may also be configured to extract RDI-V, RFI-V and REI-

V from two independent serial remote alarm ports, RADEAST and RADWEST.

In all cases, the RDI-V and RFI-V state will be sent for a minimum of 10

multiframes before changing, unless a higher priority alarm is required.

The TRAP provides selection between the Telecom Drop bus alarms and the two

remote serial alarm ports for the source of remote alarm status on a per-tributary

basis. By default, all three sources are disabled. Tributaries in any of the three

sources of remote alarms can be mapped to arbitrary tributaries in the outgoing

data stream. The mapping is configured through the TRAP Indirect Remote

Alarm Page Address, TRAP Indirect Remote Alarm Tributary Address and TRAP

Indirect Datapath Tributary Data registers. A valid TU designation written via the

TRAP Indirect Datapath Tributary Data register is all that is required to enable

the alarms for the outgoing tributary specified by the TRAP Indirect Remote

Alarm Tributary Address register. Although it is possible to have any subset of

the three sources enabled, it is usual to have only one of the three sources

enabled for a particular tributary.

9.30 Transmit Tributary Bit Asynchronous Mapper (TTMP)

Each one of three Transmit Tributary Mapper blocks bit asynchronously maps up

to 28 T1 or 21 E1 streams into an STS-1 SPE, TUG3 in a STM-1/VC4 or STM-

1/VC3 payload. The TTMP compensates for any frequency differences between

the incoming individual serial bit rates and the available STS-1 or STM-1/VC3

payload capacity. The asynchronous T1 mapping consists of 104 octets every

500 µs (2 KHz). The asynchronous E1 mapping consists of 140 octets every 500

µs (2 KHz). Refer to the RTDM block for a description of the asynchronous T1

and E1 mappings.

The tributary mapper is a time-sliced state machine which uses a payload buffer

as an elastic store. The T1 or E1 streams are read from the payload buffer, and

mapped into VT1.5 Payloads and VT2 Payloads using bit asynchronous

mapping only.

The Tributary Mapper compensates for phase and frequency offsets using bit

stuffing. A jitter-reducing control loop is used to monitor the Payload Buffer depth

and reduce mapping jitter to 1.0 UI. To reduce mapping jitter even further, a

dither technique is inserted between the control loop and the stuff bit generator

resulting in an acceptable desynchronizer mapping jitter of about 0.3 UI.

PM5366-PI Datasheet(PDF) 120 Page - PMC-Sierra, Inc

PM5366-PI Datasheet(HTML) 120 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