tdat04622 ETC-unknow, tdat04622 Datasheet - Page 76

• Manufacturer Part Number: tdat04622
• Description: Tdat Sonet/sdh 155/622/2488 Mbits/s Data Interfaces
• Manufacturer: ETC-unknow

TDAT042G5 SONET/SDH
155/622/2488 Mbits/s Data Interface
Overview
SDL Support
Supports the simplified data link (SDL) protocol, which is currently being reviewed in standards bodies. The imple-
mentation supports 4-byte modified SDL UNI including the following:
I
I
I
I
I
I
I
TDAT042G5 provides support for a provisionable offset to the packet to allow for the attachment of layer 2 routing
information (e.g., MPLS tags). Table 11 defines the provisioned value for each offset.
Table 11. Optional Offset Field
The packet length value (header value that CRC is calculated over) will account for the total length of the packet
datagram as well as the associated route tags.
48
CRC-16 based frame delineation with 2-byte packet field length
Forty-eighth order scrambler
No HDLC-like packet expansion
Optional CRC-16/-32 payload check
Capable of packet-over-fiber operation (i.e., no SONET frame)
Two user-programmable 6-byte OAM messages
Optional offset field from 0 to 32 bytes
Provisioned
Value
0xA
0xB
0xC
0xD
0xE
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xF
(continued)
Route Tag Length
(Bytes)
10
12
14
16
20
24
32
0
1
2
3
4
5
6
7
8
Agere Systems Inc.
Data Sheet
May 2001