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Quick Details

  • Place of Origin: China (Mainland)
  • Brand Name: Toptrans
  • Model Number: TOP-SFP-1.25G-20D
  • Wavelength: 1310nm
  • Rate: 1.25G
  • Distance: 20km
  • Connector: LC
  • Diagnostics: digital
  • Name: DDM SFP
  • Temperature: 0°C~70°C
  • Voltage supply: 3.3v
  • Module type: Pluggable
  • Warranty: 3 years

Packaging & Delivery

Packaging Details according to quantity ,we can offer 1 by one in box ,or 10pcs in plastic box or 20pcs. and we can do as required
Delivery Time Shipped in 2 days after payment

RTXM177-B1-1 WTD compatible 1.25G 20km 1000base-lx sfp 1310nm

  • Gigabit 1310nm SFP 20km 1.25G optical transceiver
  • High Quality with CE, FCC, and RoHS certificates
  • Condition: Brand New
  • Manufacturer: TOPSTAR


Product Description

1000base-lx sfp 1310nm

Topstar test each piece of TOP-SFP-1.25G-10D DDM (1000base-lx sfp 1310nm 20km) optical transceiver before shipment to make sure the TOP-SFP-1.25G-10D DDM can work in your system without any problems. If you need the datasheets of TOP-SFP-1.25G-10D DDM, please feel free to contact us.


  What is the Applications of our optical module ?

Packaging & Shipping
1000base-lx sfp 1310nm


1. International Express: DHL, FedEx, UPS, TNT and EMS
2. Customers specifying freight forwarders or negotiable shipping methods!

3. Delivery 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



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. 




Our Services

1000base-lx sfp 1310nm


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


1000base-lx sfp 1310nm

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 fellowing: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 equipment



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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Transaction Details

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