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Quick Details

  • Place of Origin: China (Mainland)
  • Brand Name: Top-Trans
  • Model Number: TOP-BIDI-1.25G-20AD
  • Rate: 1.25G
  • Wavelength: Tx1310/Rx1550nm
  • Distance: 20km
  • Connector: LC Connector
  • Diagnostics: digital
  • Name: BIDI SFP
  • Temperature: 0°C~70°C
  • Voltage supply: 3.3v
  • Module type: 1.25g bidi sfp 20km ddm
  • Warranty: 3 years

Packaging & Delivery

Packaging Details Anti-static package, standard packing
Delivery Time Shipped in 2 days after payment

Fiber optical cable 1310/1550nm 1000base 1.25g BIDI SFP 20km with DDM optics transceiver

  • 1.25g bidi sfp 20km ddm

  • 1000base 1.25g bidi sfp 20km

  • 1.25g bidi sfp 20km ddm

  • Tx1310/Rx1550nm BIDI SFP 1.25G 20KM optical transceiver
  • High Quality with CE, FCC, and RoHS certificates
  • Condition: Brand New
  • Manufacturer: TOPSTAR
Product Description

1.25g bidi sfp 20km ddm


  • Up to 1.25Gb/s data links
  • PIN photo-detector
  • Up to 20km on 9/125μm SMF
  • Hot-pluggable SFP footprint
  • BIDI LC/UPC type pluggable optical interface
  • Low power dissipation
  • Metal enclosure, for lower EMI
  • RoHS compliant and lead-free
  • Single +3.3V power supply
  • Support Digital Diagnostic Monitoring  interface
  • Case operating temperature  Commercial: 0°C to +70°C Extended: -10°C to +80°C Industrial: -40°C to +85°C

 1.25g bidi sfp 20km ddm

More Chioce:



  What is the Applications of our optical module ?

Packaging & Shipping

 1.25g bidi sfp 20km ddm



1. International ExpressDHL, FedEx, UPS, TNT and EMS

2. Customers specifying freight forwarders or negotiable shipping methods!

3Delivery Time: 1 working day after received payment


Payment Terms

1. Payment: T/T, Western Union, MoneyGram,HSBC, as well as Cash Payment

2. MOQ: 10pcs

3. Warranty :  3 years

4. Package Informations: according to quantity ,we can offer 1 by one in box ,or 10pcs in plastic box or 20pcs. and can do as required



Company Information

1.25g bidi sfp 20km ddm


1. 100% new materials for production, the chips are purchased from international firms such as Maxim, CY,Mitsubishi etc. 

2. High quality products with ISO9001, RoHS, FCC, CE Certificates. 

3. Multiple detection: Raw materials detection, three rounds of testing for the optical and electrical properties, 24 hours aging test, compatibility testing on switches before delivery.



 1. Several production lines for producing different products at the same time.


 2. Perfect and wide compatibility. 3.Big capability of manufacture for  40,000~100,000 pieces of fiber optical module per month. 



1. 3 years warranty. 

2. Multi language services: English, Russian ,Italian and  Spanish etc. 

3. Reply inquiries within 1 hour and support online at 24*7. 

4. Over ten years experienced technical team support. 

5. Customized labels and packages, and ODM & OEM services offered.


 Topstar compatible modules are qualified with 3 years' warranty and life time technical support.


  • Advanced dust-free workshop
  • Transceiver production capacity: 100k pcs/month
  • Factory Area: 3000square meters
  • 100% new materials for production and reliable quality
  • Experienced technicians

 Welcome your inquiry ,and highly welcome to visit our factory !!!

 For more information , we will reply you within 1 hour in our working time.



Our sales team and customer visiting



transceiver 1.25g bidi sfp 20km ddm

Q1. Are your transceiver modules compatible with Cisco? 

A1: Yes, Topstar  transceivers can compatible with Cisco. All the brand  Topstar's SFP compatible as the following:Cisco, Nortel, Juniper, 3COM, HUAWEI, H3C, Alcatel-lucent, FOUNDRY, D-Link,  EXTREME,  Ruijie, NETGEAR,  ZTE, Enterasys,ZyXEL, Linksys, Ericsson, DCN, Allied, SMC,  Brocade, Force10, Hirschmann, Planet, Adtran, ASNTE, Trendnet, BDCOM, BLADE, BITWAY, Telco, Feixun...etc



Q2. How does your company do regarding quality control?

A2: Every single optic individually tested in our test center , and also tested for compatibility on a variety of different brands of network equipments.



Q3. What are the trade terms?

A3: Lead Time:most popular optics in stock ,ready to ship.some of higher-value and specialize optics have a  short lead time. 

        Payment term: Western union, T/T, Aliexpress escow, money gram ,cash payment

        Warranty:  3 year  



 Q4. What is operating temperature range of optical modules?

A4: Commercial temperature range(COM) : 0 to 70°C(32 to 158°F)

     Extended temperature range(EXT):-5 to 85°C(23 to 185°F)

     Industrial temperature range(IND)::-40 to 85°C(-40 to 185°F)

     Storage temperature range:-40 to +85°C(-40 to 185°F)

     We can supply according to your request. 

Transaction History of the Supplier

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China (Mainland)
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Supplier's Trade Assurance Limit: US $40,000
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