參數(shù)資料
型號(hào)： XRT86VL3x
廠商： Exar Corporation
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)： 128/153頁
文件大?。?/td> 1316K
代理商： XRT86VL3X
XRT86VL3X
121
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.2
10.6
T1 Non-Signaling Frame Format
The Non-Signaling (N) framing format is a simplified version of the T1 super frame. The N-Frame consists of
four frames with two Fs bits and two Ft bits. The Fs bits can be used as a proprietary 4kbps data link
transmission. Signaling is not supported in this framing format.
10.7
T1 Data Multiplexed Framing Format (T1DM)
T1DM uses a similar framing structure as the SF (D4), such that the Fs and Ft bits on the individual frame
boundaries remain the same. The differentiation between T1DM and SF is within the payload time slots. Time
slot 24 cannot be used for data when configured for T1DM. Time slot 24 is dedicated for a special
synchronization byte as shown in
Figure 109
. The Y-bit is to carry the status of the Yellow Alarm. The R-bit is
dedicated for a remote signaling bit typically not used. However, the framer allows this bit to carry an HDLC
message. Time slots 1 through 23 are used to carry the seven bit word from each of the 23 DS-0 signals.
T
ABLE
12: N
ON
-S
IGNALING
F
RAMING
F
ORMAT
F
RAME
B
IT
F-B
ITS
T
ERMINAL
F
RAMING
F
T
T
ERMINAL
F
RAMING
F
S
1
0
1
----
2
193
----
X
3
386
0
----
4
579
----
X
F
IGURE
109. T1DM F
RAME
F
ORMAT
F
Time Slot
1
Time Slots
2 through 23
Time Slot
24
Bit 1
Bit 2
Bit 3
Bit 4
Bit 6 Bit 7
C
Bit 5
1
0
1
1
Y
R
0
1
12 T1DM Frames
per Multi-frame
T1DM Frame
相關(guān)PDF資料
PDF描述
XRT86VL3X_07 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT86VL3X Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT91L30_0611 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L306 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30IQ STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
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