參數(shù)資料
型號(hào)： DS21Q44
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 38/105頁
文件大?。?/td> 620K
代理商： DS21Q44
DS21Q44
38 of 105
ALARM CRITERIA
Table 7-1
ALARM
SET CRITERIA
CLEAR CRITERIA
ITU
SPEC.
G.732
4.2
RSA1
(receive signaling all ones)
over 16 consecutive frames
(one full MF) timeslot 16
contains less than three zeros
over 16 consecutive frames
(one full MF) timeslot 16
contains all zeros
bit 6 in timeslot 16 of frame
0 set to one for two
consecutive MF
less than three zeros in two
frames (512–bits)
bit 3 of non–align frame set
to one for three consecutive
occasions
255 (or 2048) consecutive
zeros received
over 16 consecutive frames
(one full MF) timeslot 16
contains three or more zeros
over 16 consecutive frames
(one full MF) timeslot 16
contains at least a single one
bit 6 in timeslot 16 of frame
0 set to zero for two
consecutive MF
more than two zeros in two
frames (512–bits)
bit 3 of non–align frame set
to zero for three consecutive
occasions
in 255–bit times, at least 32
ones are received
RSA0
(receive signaling all zeros)
G.732
5.2
RDMA
(receive distant multiframe
alarm)
RUA1
(receive unframed all ones)
RRA
(receive remote alarm)
O.162
2.1.5
O.162
1.6.1.2
O.162
2.1.4
RCL
(receive carrier loss)
G.775 /
G.962
SR2: STATUS REGISTER 2
(Address=07 Hex)
(MSB)
RMF
(LSB)
TSLIP
RAF
TMF
SEC
TAF
LOTC
RCMF
SYMBOL
POSITION
NAME AND DESCRIPTION
RMF
SR2.7
Receive CAS Multiframe
. Set every 2 ms (regardless if CAS
signaling is enabled or not) on receive multiframe boundaries.
Used to alert the host that signaling data is available.
Receive Align Frame.
Set every 250 s at the beginning of
align frames. Used to alert the host that Si and Sa bits are
available in the RAF and RNAF registers.
Transmit Multiframe.
Set every 2 ms (regardless if CRC4 is
enabled) on transmit multiframe boundaries. Used to alert the
host that signaling data needs to be updated.
One Second Timer.
Set on increments of one second based on
RCLK. If CCR2.7=1, then this bit will be set every 62.5 ms
instead of once a second.
Transmit Align Frame.
Set every 250 s at the beginning of
align frames. Used to alert the host that the TAF and TNAF
registers need to be updated.
Loss of Transmit Clock.
Set when the TCLK pin has not
transitioned for one channel time (or 3.9 s). Will force the
LOTC pin high if enabled via TCR2.0.
RAF
SR2.6
TMF
SR2.5
SEC
SR2.4
TAF
SR2.3
LOTC
SR2.2
相關(guān)PDF資料
PDF描述
DS21Q44T Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
DS21Q44TN MICROSWITCH, SPDT, SIM ROLLER LEVER; Current, contact AC:5A; Force, operating:91.75gf; Travel, pre:16.0mm; Centres, fixing LxW:22.2mm; Temp, op. max:120(degree C); Temp, op. min:-40(degree C); Length / Height, external:9.25mm; Width, RoHS Compliant: Yes
DS2251T-128-16 CONNECTOR ACCESSORY
DS2251T-32-16 128k Soft Microcontroller Module
DS2251T-64-16 CONNECTOR ACCESSORY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21Q44T 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q44T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q44TN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q48 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q48A3N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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