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MSTP transmission platform

Distance of 1310nm CWDM SFP+ transceiver and 1550nm CWDM SFP+ transcveiver:
[1] based on SDH multi-service transport node, in addition to have the function of the standard SDH transmission node, but also has the following main functional characteristics.
(1) TDM services, ATM services or Ethernet access capabilities;
(2) TDM services, ATM services or Ethernet service delivery features include point-to-point transparent transmission function;
(3) ATM services or Ethernet bandwidth statistical multiplexing function;
(4) ATM services or assigned functions Ethernet services mapped to the SDH virtual containers.

MSTP based on SDH multi-service transmission node can be applied in the transport network access layer, convergence layer according to the network needs, but applied in the backbone layer is to be studied.
MAN is the focus of telecom operators compete for a wide range of metropolitan area network technology, generally including the SDH structure-based metropolitan area network, Ethernet structure based metropolitan area networks, ATM structure based metropolitan area network, and DWDM structure based metropolitan area network. In fact, SDH, ATM, Ethernet, WDM and other technologies are continuing to draw on the strengths of other technologies, learn from each other, it is necessary to achieve rapid transmission, but also to meet the multi-service bearer, and provide carrier-class QoS, all kinds of showed a trend of convergence between the MAN technology.

ONET/SDH—Signal level


SONET

SDH

Data rate(Mbps)

Fiber

Electric

OC-1

STS-1

 


51.84

OC -3

STS-3

STM-1

155.52

OC-12

STS-12

STM-4

622

OC-24

STS-24

 


1244.16

OC-48

STS-48

STM-16

2488. 32

OC-192

STS-192

STM-64

9953.28

OC-768

STS-168

STM-256

39,813.12

Related Tutorials

Common-Badness Reason Judging Method

1. Visual Method: Check the faulty module appearance. Whether there is obvious damage, component burned black, dehiscence, leakage, even tin or not.2. Comparative Law: Use certain tools and a good module. Test the good module and the target module. Mainly analyze circuit parts or components' resistance, voltage, waveform, etc. Then make a comparison.3. Substitution Method: To replace the components of the module; then to analyze the change of operating parameters.  4. Others

Reason and Maintenance methods of common problem of optical module internally

A. Optical power badness performance A1. BIAS optical bias current within the normal range, the optical power exceeds out of the control range. A2. Laser bias current of BIAS in the normal range, the optical power is less than the control range. A3. There is no light. A3.a. BIAS value is displayed as 0. A3.b. BIAS short circuit, value is very great, displayed as 90mA ~ 150mA; and data can be saved. A4. There is light during the debug process, but the optical power don't change A5. Optical power is unstable. A6. Side mode suppression ratio is small. B. Eye diagram badness performance B1. Extinction ratio of non-performing B1.a Small extinction ratio B1.b Large extinction ratio B2. Eye

Reason and Maintenance methods:

A1.1 Emission component TOSA is bad. Maintenance method is to replace the TOSA.A1.2 The TOSA PINs PD+ is welded badly so that the power is so large. But when debug the software, the power won’t be changed. Maintenance method is to weld the pin better.A1.3 Power and resistance don't match with the BIAS optical bias current. Maintenance method is to improve the power and resistance. A2.1 Emission component TOSA is bad. The maintenance method is to replace the TOSA.A2.2 Paste is bad or poor performance of driver chip. The repair method is to re-paste driver chip or to replace the chip.A2.3 Power and resistance don't match with the BIAS optical bias current. Maintenance method is to reduce
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