Transceivers
Every unit tested in-house by certified technicians. Orders placed by 12pm ship same day. 30-day returns on unused hardware.
Transceivers in the catalog
QSFPP-40GBASE-SR4
QSFPP-40GBASE-SR4 Juniper transceiver, 40GE QSFP+ SR4, 850 nm, MMF, MPO connector, 150m
In stock
57-0000089-01
57-0000089-01 Brocade, 16Gb Fibre Channel SFP+ transceiver, long-wave 1310 nm
In stock
QSFP-100GBASE-LR4
QSFP-100GBASE-LR4 Juniper, 100GBASE-LR4 QSFP28 transceiver, part 740-058732, duplex LC
In stock
SFP-10G-LR
SFP-10G-LR Cisco transceiver, SFP+ 10GBase-LR 1310nm 10KM
In stock
SFP-1GE-SX
SFP-1GE-SX Juniper, 1000BASE-SX SFP transceiver, multimode fiber, up to 500 m
In stock
10G-SFPP-SR
10G-SFPP-SR Brocade transceiver, 10GBASE-SR, SFP+ optic (LC), target range 300m over MMF
In stock
10G-XFP-LR
10G-XFP-LR Foundry, 10GBASE-LR XFP transceiver, 1310 nm, LC duplex
In stock
40G-QSFP-LR4
40G-QSFP-LR4 Brocade, 40GBASE-LR4 QSFP+ transceiver, LC duplex, 1-pack
In stock
57-1000027-02
57-1000027-02 Brocade, 8Gb Fibre Channel SFP+ transceiver, long-wave 1310 nm
In stock
EX-SFP-1GE-LX
EX-SFP-1GE-LX Juniper transceiver, 1000BASE-LX SFP Juniper EX
In stock
X2-10GB-CX4
X2-10GB-CX4 Cisco transceiver, 10GBASE-CX4 X2 module, 10GbE over CX4 copper cable, about 15 m
In stock
WS-G5484
WS-G5484 Cisco transceiver, 1000BASE-SX Short Wavelength GBIC (Multimode only)
In stock
E1MG-LX
E1MG-LX Foundry transceiver, 1000Base-LX SFP optic, SMF, LC connector
In stock
XBR-25G-SR-01
XBR-25G-SR-01 Brocade, 25GBASE-SR SFP28 transceiver, 850 nm multimode, up to 100 m on OM4
In stock
XENPAK-10GB-LX4
XENPAK-10GB-LX4 Cisco transceiver, 10GBASE-LX4 XENPAK Module
In stock
More of the catalog
Buying in volume, or don't see the exact part number? We quote same day.
Request a quoteWhy buy from Townsend
The model
We buy, sell and trade hardware
We buy and sell tested Juniper, Arista, Brocade, and Cisco hardware. The same bench that grades equipment for our buyers evaluates the equipment we buy from our sellers, so every grade has to stand up on both sides of the transaction.
The bench
We don't take a supplier's word for it. We test it ourselves.
Every unit goes to our own certified technicians before it reaches the shelf: powered up, ports exercised, PSUs, fans and thermals checked, then verified again before it ships. Not a drop-ship, not a photograph of someone else's stock.
The desk
A person who knows the hardware
Quotes are answered by someone who can tell you what an EX4600-40F-AFI is without looking it up, and who will say so when a part is the wrong one for the job, usually the same business day.
Questions buyers ask
- Is the hardware tested before it ships?
- Yes. Every unit (new-excess, used, or refurbished) is bench-tested in-house by certified technicians before it is listed, and re-verified before it ships. See our Testing Process page for the details.
- How fast do orders ship?
- Orders placed by 12pm ship the same business day. Overnight shipping is available across the US, and we deliver worldwide.
- Do you buy used equipment?
- Yes. Buying and liquidating surplus gear is half our business. We buy Juniper, Arista, Brocade and Cisco hardware for cash, wire, or trade-in credit, arrange pickup, and process within 48 hours of receipt.
- How do quotes work for unpriced items?
- High-ticket and bulk items are quote-driven. Send the part number and quantity through the quote form, chat, or phone and a human who knows the hardware will come back with a firm price, typically the same business day.