參數(shù)資料
型號(hào)： TNET3001
廠商： Texas Instruments, Inc.
英文描述： SONET STS-1 Overhead Terminator(SONET STS-1附加終端)
中文描述： SONET的STS - 1的開銷終結(jié)者（SONET的STS - 1的附加終端）
文件頁(yè)數(shù)： 3/49頁(yè)
文件大?。?/td> 1090K
代理商： TNET3001
TNETS3001
SONET STS-1 OVERHEAD TERMINATOR
SDNS007B – OCTOBER 1993 – REVISED JUNE 1995
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional block diagram
RXRTM + (SPE * PARA)
M
Transport
Overhead
MUX
Orderwire/
Datacom
Extract
RLCI
RLDI
RFRI
TLCO
TLDO
TLCI
TFRI
Framing
and
Pointer
Tracking
Overhead
Processing
Receive
Retiming
RTDO
RSPE
RSYN
TPDO7–TPDO0
TPCO
Microprocessor
Interface
RTCO
M
STS-1 Signal
ALE
SEL
RD
WR
INT
RDY
AD7–AD0
Path
Overhead
RAMs
Framing
and
Pointer
Tracking
Transport
Overhead
RAMs
Transmit
Retiming
M
Parallel
to
Serial
MUX 2
PLL
RLCI
R
M
SPE
RTLOOP [PARA +(RXRTM * SPE)]
SPE Only
to
STS-1
TSYN
TTDI
TSPE
TPDI7–TPDI0
TPCI
TTCI
MUX 6
Orderwire/
Datacom
Insert
TLCI
TCLK
T
TRLOOP
TLCI
RCLK
The following internal control bits are identified as shown:
RCLK – See control register 5, bit 6
TCLK – See control register 5, bit 5
RXRTM – See control register 9, bit 1
SPE – See control register 5, bit 7
PARA – See control register 2, bit 6
TRLOOP – See control register 0, bit 0
RTLOOP – See control register 3, bit 0
detailed description
The input multiplexer MUX 1 shown in the functional block diagram selects either the line-side input or the
loopback signal from the transmit-line output as the input to the framing and pointer-tracking function. The
framing and pointer-tracking function performs frame synchronization to the incoming STS-1 signal,
serial-to-parallel conversion, and pointer tracking; incoming STS-1 alarms are also detected. The
overhead-processing function stores the line, section, and path-overhead bytes into RAM locations for access
by the microprocessor. It then optionally multiplexes the line, section, and path-overhead bytes from the RAM
locations written by the microprocessor. Incoming SONET performance-monitoring functions and debouncing
of selected overhead bytes are also performed by the overhead-processing function. The orderwire/datacom
extract function extracts and routes the section and line data-communication bytes to the two datacom
interfaces and the APS and the two orderwire bytes to the orderwire interface.
P
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