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參數資料
| 型號： | W6692 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 通信及網絡 |
| 英文描述： | PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數： | 21/84頁 |
| 文件大小： | 473K |
| 代理商： | W6692 |
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W6692
Publication Release Date: October 1998
- 21 -
Revision A1
7.2.4 D Channel Access Control
The D channel access control includes collision detection and priority management. The collision
detection is always enabled. The priority management procedure as specified in ITU-T I.430 is fully
implemented in W6692.
A collision is detected if the transmitted D bit and the received echo bit do not match. When this
occurs, D channel transmission is immediately stopped and the echo channel is monitored to attempt
the next D channel access. The layer 1 module uses an internal signal to inform layer 2 module of the
collision condition (DRDY bit goes inactive in D_STAR register).
There are two priority classes: class 1 and class 2. Within each class, there are normal and lower
priority levels.
Table 7.4 D priority classes
NORMAL LEVEL
LOWER LEVEL
Priority class 1
8
9
Priority class 2
10
11
The selection of priority class is via the AR8/AR10 command. The following table summarizes the
commands/indications used for setting the priority classes:
Table 7.5 D Priority commands/indications
COMMAND
SYM.
CODE
REMARKS
Activate request, set priority 8
AR8
1000 Activation command, set D channel priority to 8
Activate request, set priority 10
AR10
1001 Activation command, set D channel priority to 10
INDICATION
ABBR.
REMARKS
Activate indication with priority 8
AI8
1100 Info 4 received, D channel priority is 8 or 9
Activate indication with priority 10
AI10
1101 Info 4 received, D channel priority is 10 or 11
7.2.5 Frame Alignment
The following sections describe the behavior of W6692 in respect to the CTS-2 conformance test
procedures for frame alignment. Please refer to ETSI-TM3 Appendix B1 for detailed descriptions.
相關PDF資料 |
PDF描述 |
|---|---|
| W6693A | USB Bus ISDN S/T Interface Controller(USB總線的ISDN S/T接口控制器) |
| W6694 | PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器) |
| W6810 | SINGLE-CHANNEL VOICEBAND CODEC |
| W6810IE | SINGLE-CHANNEL VOICEBAND CODEC |
| W6810IR | SINGLE-CHANNEL VOICEBAND CODEC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W6692A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TE Mode S/T Controller with PCI 2.2 Interface and ACPT |
| W6692ACD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN LINE INTERFACE|BASIC|CMOS|QFP|100PIN|PLASTIC |
| W6692ACF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN LINE INTERFACE|BASIC|CMOS|QFP|100PIN|PLASTIC |
| W6694 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:USB Bus ISDN S/T-Controller |
| W6694A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TE Mode S/T Controller with USB 1.1 Interface |
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