參數(shù)資料
型號: T7230A
廠商: Lineage Power
元件分類: 通信及網(wǎng)絡
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): 27/110頁
文件大?。?/td> 752K
代理商: T7230A
Preliminary Data Sheet
June 1997
T7230A Primary Access Framer/Controller
23
Lucent Technologies Inc.
Line Interface
(continued)
Physical Interface
(continued)
Figure 7 shows the facility data link timing for XFD-XFCK and RFD-RFCK signals.
5-3910(F)r.3
Figure 7. T7230A Facility Data Link Timing
Line Encoding
Single Rail
The XPD output transmits the data in binary form while the XND output is forced to a 0 state. The RPD input
receives binary data while pulses on the RND input are counted as bipolar violations in the BPV register. This
scheme is shown in Table 3.
Table 3. Single-Rail Encoding
Alternate Mark Inversion (AMI)
The default line code used for T1 is alternate mark inversion (AMI). The coding scheme represents a 1 with a pulse
or mark on the positive or negative rail and a 0 with no pulse on either rail. This scheme is shown in Table 4.
Table 4. AMI Encoding
The T1 “ones density rule” states that:
I
In every 24 bits of information to be transmitted, there must be at least three pulses, and no more than 15 zeros
may be transmitted consecutively.
AT&T Technical Reference 62411 for digital transmissions requires that:
I
In every 8 bits of information, at least one pulse must be present.
Bit Stream
Single-Rail Data (RPD)
1011
1011
0000
0000
0111
0111
1010
1010
Input Bit Stream
AMI Data
1011
+0+–
0000
0000
0111
0+–+
1010
–0+0
t8
t9
t9
t10
t11
t8: XFCK CYCLE = 250
μ
s
t9: XFD TO XFCK SETUP AND HOLD = 100 ns
t10: RFCK CYCLE = 250
μ
s
t11: RFCK TO RFD DELAY = 80 ns
XFCK
XFD
RFCK
RFD
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相關代理商/技術參數(shù)
參數(shù)描述
T-7230A--ML 制造商:Rochester Electronics LLC 功能描述:- Bulk
T7230-ML3 制造商:AGERE 功能描述:
T7-231A1 功能描述:撥動開關 ON NONE OFF 2 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點形式: 開關功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風格: 端子密封: 觸點電鍍: 照明:
T7-231A2 制造商:OTTO Engineering Inc 功能描述:2POLE, SOLDER, STD,
T7-231A2D 功能描述:撥動開關 ON NONE OFF 2 Pole Standard LeverLock RoHS:否 制造商:OTTO 觸點形式: 開關功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風格: 端子密封: 觸點電鍍: 照明: