cx28224 Mindspeed Technologies, cx28224 Datasheet - Page 21

• Manufacturer Part Number: cx28224
• Description: Cx28224/5/9 Inverse Multiplexing For The Atm Ima Family
• Manufacturer: Mindspeed Technologies

CX28224/5/9 Data Sheet
Table 1-1. IMA Overhead Cell Definition (3 of 3)
Table 1-2. IMA Overhead Filler Cell Format
28229-DSH-001-D
19–49
52–53
52–53
Octet
Octet
8–51
1–5
15
16
17
18
50
51
6
7
End-to-end channel
Link 0 Information
CRC Error Control
CRC Error Control
ATM Cell Header
Tx Test Control
Tx Test Pattern
Rx Test Pattern
Link 1–31 Info
IMA Label
Unused
Unused
Link ID
Cell ID
Field
Field
Test Pattern Command
Value from 0 to 255
Value from 0 to 255
Link State Machine and Defect Information for link with LID = 0
Bits 7–5 Transmit LSM state
Bits 4–2 Receive LSM state
Bits 1–0 Rx Link defect status
Status and control of link with LID in the range 1–31
Set to 0x6A (as defined in ITU-T I.432)
Proprietary channel (set to 0 if unused). The CX2822x does not support this octet.
Bits 15-10 Reserved field for future use—default value is all zeros
Bits 9-0 CRC-10 as defined in ITU-T Recommendation I.610
OAM cell type: Octet 1 = 0000 0000
Octet 2 = 0000 0000
Octet 3 = 0000 0000
Octet 4 = 0000 1011
Octet 5 = 0110 0100 (valid HEC)
OAM type field:
0000 0001—IMA Version 1.0
0000 0011—IMA Version 1.1
Bit 7 Set to 0 for IMA Filler cell
Bits 6–0 Unused and set to 0
Set to 0x6A (as defined in ITU-T I.432)
Bits 15-10 Reserved field for future use—default value is all zeros
Bits 9-0 CRC-10 as defined in ITU-T Recommendation I.610
Bits 7–6 Unused, set to 00
Bit 5 Test Link Command (0: inactive, 1: active)
Bits 4–0 Tx LID of test link—Range: 0 to 31
00: no errors
01: Physical Link defect (e.g., LOS, OOF/LOF, LCD)
10: LIF
11: LODS
Mindspeed Technologies
Description
Description
™
Introduction to IMA
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