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Technical Support

For all GPON, EPON, fiber media converter, industrial switches and other products, we provide professional technical support, including email, telephone, online technical support, remote assistance, etc.


Contact information for the 7 x 24 technical support period.
Mobile number: +86 15712000724
Skype: allenker
Email: technical@htopto.com


FAQ:

1. Common faults and troubleshooting methods of fiber media converter

2.Video optical converter FAQ

3. What is the difference between HGU, SFU, MDU, MTU and SBU?

4.What is the difference between EPON and GPON?

5. How to trouble shoot a Fiber Optic Transceiver

6. How to connect a IP Cameras/webcam?


7.ITU 50GHz Center Wavelengths and Channel Numbering

8.Installing SFP and XFP Transceivers and GBICs

9.What's a watchdog? What is the purpose of a watchdog?

10. The Difference Between OM1,OM2,OM3 and OM4 Multimode Fibers

11.What is the difference among F/UTP,S/UTP,SF/UTP,S/FTP,F/FTP,U/FTP and U/UTP cables?

12. Fiber Optic Patchcord Production Flow

13. The basis for judging the compatibility of optical modules

1. Does it have the data diagnostic monitoring interface (DDMI) specified by SFF-8472 standard?
DDMI, also called DDM or DOM, has an alarm function when one or more data during the operation of the optical module exceeds the standard parameters specified by the manufacturer. The DDM function in optical modules provides a means of performance monitoring for systems that can help system management predict module life, isolate system failures, and verify module compatibility in field installations. If a compatible optical module has a data diagnostic monitoring function (DDM), it can be used to monitor the real-time parameters of the SFP optical module (including optical output power, optical input power, temperature, laser bias current and transceiver supply voltage, etc.) in order to quickly locate the fault location.
2. Does it pass compatibility verification?
Generally speaking, the higher the performance of the optical module, the stronger the compatibility. The compatibility of the optical module needs to be tested on the switch to check the working of the module, which is the only way to determine the good or bad performance of the optical module.


14. How to install and remove SFP/XFP modules?


15. 40G QSFP+ Optical Module with AOC/DAC Cable FAQ.

Q1: Can 40G optical modules be connected with 10G optical modules?
A1: Not all 40G optical modules can be connected with 10G optical modules, only 4*10G parallel transmission optical modules can be connected with 10G optical modules, for example: 40G multimode optical modules (QSFP+ SR4) can be connected with 10G 10G 10G multimode optical modules (SR) by using MPO-LC multimode OM3 fiber optic patch cables because they are both multimode optical modules and the wavelengths are all 850nm. 850nm, and 40G SR4 optical modules are backward compatible with IEEE 802.3ae 10GBASE-SR Ethernet protocol; 40G single-mode optical modules (QSFP+ PSM4) can be connected using MPO-LC single-mode OS2 fiber patch cords and 10G 10G single-mode optical modules (LR) because their wavelengths are 1310nm, and 40G PSM4 optical modules are backward compatible with IEEE 802.3ae 10GBASE-SR Ethernet protocol. optical modules are backward compatible with the IEEE 802.3ae 10GBASE-LR Ethernet protocol.

Q2: Where are 40G DAC high-speed cables used?
A2: 40G DAC high-speed cables are mainly used for transmission in data center cabinets, because high-speed cables do not use expensive optical devices and optical fibers as components, so the transmission distance is short and the price is low, which is very suitable for connecting servers and switches inside cabinets.

Q3: Can 40G and 10G ports be connected with cables?
A3: Yes, 40G AOC/DAC cables have QSFP+ to 4*SFP+ branch cables, which can interconnect 40G ports and 10G ports using these cables.

Q4:How many kilometers can 40G optical module transmit?
A4:Single-mode 40G QSFP+ ZR4 module can transmit up to 80 kilometers.

Q5:Does 40G optical module support both single and multi-mode fiber transmission?
A5: 40G QSFP+ LX4 optical module supports the use of multimode OM3/OM4 fiber patch cord transmission, up to 150 meters, also supports the application of single-mode OS2 fiber patch cord transmission, up to 2 km. Its interface type is dual LC, wavelength 1271, 1291, 1311, 1331nm, the use of LX4 can be adapted to the data center more flexible cabling.


Q6: Are there any more fiber-saving options for 40G multimode transmission?
A6: 40G SR4 needs to use at least 8-core multimode OM3 fiber for transmission, so it increases the cost of data center fiber cabling, but 40G multimode optical module is not the only SR4, there are also multimode PAM4 optical modules with PAM4 modulation technology, 40G BiDi optical modules, 40G SWDM4 optical modules, they are all multimode optical modules, the interface type is double LC They are all multimode optical modules with dual-LC interface type, and only need 2 cores of multimode OM3/OM4 fiber to achieve 40G rate transmission.

Q7:What are the types of 40G single-mode optical modules?
A7:The common 40G single-mode optical modules are 40G PSM4, 40G LR4, 40G ER4 and 40G ZR4. Among them, 40G PSM4 can transmit up to 2 kilometers, 40G LR4 can transmit up to 10 kilometers, 40G ER4 can transmit up to 40 kilometers, and 40G ZR4 can transmit up to 80 kilometers.