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參數(shù)資料
| 型號： | MT90883 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | TDM to Packet Processors |
| 中文描述： | TDM到分組處理器 |
| 文件頁數(shù)： | 36/97頁 |
| 文件大?。?/td> | 702K |
| 代理商： | MT90883 |
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MT90880/1/2/3
Data Sheet
36
Zarlink Semiconductor Inc.
Figure 18 - Packet Structure for MT9088x Family
5.4.3 Context Descriptor Protocol
The MT9088x family uses a two-byte field within the packet header to convey which context the packet belongs
to. The format of the field is as follows:
Figure 19 - Context Descriptor Field
Field definitions
Context ID A unique number identifying the context to the receiving device. The Context ID is assigned by the
receiving device during context establishment.
The MT9088x only supports values in the range 0-127, and hence bits 7-11 must be set to zero.
CS
Context Switch Bit. This bit toggles when there is a change to the context, e.g., addition or
deletion of new timeslots from the packet. The toggle action ensures that the change to the
context is still signalled even if the first packet indicating the change is lost.
Ver
Protocol version number.
For the MT9088x family, the version number is always zero.
5.5 Context Negotiation and Establishment
5.5.1 Overview
The establishment of a context to carry TDM data across a packet network is a negotiated process. The call
parameters (e.g. the context ID label, number of channels to be included, number of frames) must be agreed
between the host CPU's at either end of the packet network. Similarly, subsequent changes to a context must also
Static Padding
(if required)
Channel 1
Channel 2
Channel
x
Channel 1
Channel 2
Data for TDM Frame 1
Ethernet Header
Upper Layers
(optional)
Context Descriptor
Fixed Header
Ethernet FCS
Ethernet Payload
46 to 1500 bytes
Data for TDM Frame
n
Channel 1
Channel 2
Channel
x
Data for TDM Frame 2
Channel
x
Context ID
C
S
Ver.
15 12 8 7 0
相關PDF資料 |
PDF描述 |
|---|---|
| MT91600 | Programmable SLIC |
| MT91600AN | Programmable SLIC |
| MT91600AN1 | Programmable SLIC |
| MT91600ANR | Programmable SLIC |
| MT91600ANR1 | Programmable SLIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MT90883A | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:TDM to Packet Processors |
| MT90883A/IG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:TDM to Packet Processors |
| MT90883BP1N | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:TDM to Packet Processors |
| MT90883IG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:TDM to Packet Processors |
| MT9088IG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:TDM to Packet Processors |
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