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PM5365-PI 参数 Datasheet PDF下载

PM5365-PI图片预览
型号: PM5365-PI
PDF下载: 下载PDF文件 查看货源
内容描述: VT / TU映射器和M13多路复用器 [VT/TU MAPPER AND M13 MULTIPLEXER]
分类和应用: 复用器
文件页数/大小: 244 页 / 1139 K
品牌: PMC [ PMC-SIERRA, INC ]
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STANDARD PRODUCT  
PM5365 TEMAP  
DATASHEET  
PMC-1991148  
ISSUE 3  
HIGH DENSITY VT/TU MAPPER  
AND M13 MULTIPLEXER  
12.6 Telecom Bus Mapper/Demapper Loopback Modes  
The TEMAP provides two loopbacks at the telecom bus interface to aid in  
network and system diagnostics at the SONET/SDH interface. These loopback  
modes can be enabled via the microprocessor whenever the SONET/SDH block  
is enabled as the mapper for the T1/E1 framer slices or as the mapper for the  
DS3 framer or M13 Multiplexer.  
Telecom Diagnostic Loopback  
The Telecom Bus Diagnostic Loopback allows the transmitted telecom bus  
stream to be looped back into the receive SONET/SDH receive path, overriding  
the data stream received on the telecom drop bus inputs. While Telecom  
diagnostic loopback is active, valid SONET/SDH data continues to be  
transmitted on the telecom add bus outputs. The entire telecom drop bus is  
overwritten by the diagnostic loopback even though only one STS-1 SPE, STM-  
1/VC4 TUG3 or STM-1/VC3 is generated by the egress VTPP onto the telecom  
add bus. This loopback is only available for VT1.5/VT2/TU11/TU12 mapped  
tributaries. DS3 mapped tributaries must use the DS3 diagnostic loopback. The  
telecom bus diagnostic loopback mode is shown diagrammatically in Figure 28.  
Figure 28: Telecom Diagnostic Loopback Diagram  
VTPP  
VT/TU  
RTDM  
Receive  
LDDATA[7:0]  
LDDP  
LDPL  
Payload  
Processor  
Tributary  
Demapper  
LDC1J1  
LADATA[7:0]  
LADP  
VTPP  
VT/TU  
LAPL  
Payload  
Processor  
LAC1J1V1  
LAC1  
Telecom Line Loopback  
The Telecom Bus Line Loopback allows the received telecom drop bus data to  
be looped back out the telecom add bus after being processed by both the  
ingress and egress VTPPs. Both VTPP must be setup for the same STS-1 SPE,  
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use  
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