G56047-0, Rev 1.1
STS-192/STM-64 SONET/SDH Transceiver
VSC9116
VSC9116
STS-192
(STM-64) Data
VSC9112
Frame
Buffer
Generator
(TFPA48)
STS-48
(STM-16) Data
Prog
Offset
(TSC)
Loopback
Latency
STS-192
STS-48
(STM-64) Data
(STM-16) Data
Frame
Detection
Figure¬1.12. VSC9116 locks it’s outgoing transmit frame phase to the incoming receive
flow. For test modes utilizing loopback in drop side devices.
1.4.2 Synchronization flow at drop interface
96&ꢁꢂꢂꢃꢀRIIHUVꢀDQꢀLQGLYLGXDOꢀV\QFKURQL]DWLRQꢀVLJQDOꢀIRUꢀHDFKꢀGURSꢀGHYLFHꢀYLDꢀWKH
ꢋ7;6<1&ꢆ7;567>$ꢈꢈ'@ꢌꢀSLQVꢈꢀ7KHVHꢀVLJQDOVꢀFDQꢀEHꢀXVHGꢀWRꢀFRQWUROꢀWKHꢀSKDVHꢀRIꢀWKHꢀRXWJRLQJ
WUDQVPLWꢀIUDPHVꢀLQꢀWKHꢀGURSꢀVLGHꢀGHYLFHVꢈ
7KHꢀWUDQVPLWꢀV\QFKURQL]DWLRQꢀVLJQDOVꢀFDQꢀEHꢀRSHUDWLQJꢀDVꢀVLQJOHꢀVKRWꢀSXOVHVꢀRUꢀUHSHWLWLYHꢀSXOVHVꢈꢀ,Q
HLWKHUꢀFDVHꢀWKHꢀSKDVHꢀRIꢀWKHꢀIUDPHVꢀLQꢀWKHꢀGURSꢀVLGHꢀDUHꢀPDGHꢀWRꢀPDWFKꢀWKHꢀUHTXLUHGꢀSKDVHꢀLQ
96&ꢁꢂꢂꢃꢀE\ꢀPRYLQJꢀWKHꢀSXOVHꢀLQꢀWLPHꢈ
3OHDVHꢀUHIHUꢀWRꢀVHFWLRQꢀ(UURUꢀꢁ5HIHUHQFHꢁVRXUFHꢁQRWꢁIRXQGꢂꢀIRUꢀDꢀGHWDLOHGꢀGHVFULSWLRQꢈ
1.4.2.1 Synchronization Signal Generation – Single Pulse Mode
7KHꢀVLQJOHꢀSXOVHꢀLVꢀLQWHQGHGꢀIRUꢀGURSꢀVLGHꢀGHYLFHVꢀQRWꢀFDSDEOHꢀRIꢀORFNLQJꢀWKHLUꢀWUDQVPLWꢀIUDPHꢀSKDVH
WRꢀDQꢀH[WHUQDOꢀV\QFKURQL]DWLRQꢀVLJQDOꢈꢀ6XFKꢀGHYLFHVꢀPD\ꢀXVHꢀWKHꢀVLQJOHꢀSXOVHꢀDVꢀDꢀUHVHWꢀRIꢀWKH
WUDQVPLWꢀIUDPHꢀJHQHUDWLRQꢈꢀ,WꢀLVꢀUHTXLUHGꢀWKDWꢀHDFKꢀGURSꢀGHYLFHꢀKDVꢀDꢀILQLWHꢀIUDPHꢀSKDVHꢀDIWHUꢀHYHU\
UHVHWꢈ
Page 24
1.0 Product Description
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
