How does the latching mechanism handle dense line-card layouts where physical space between ports is minimal?

The module features a robust, low-profile bail latch that pull-releases smoothly, preventing physical interference or damage to adjacent simplex LC connectors during hot-swapping.

Can this 155M SFP BiDi optical module maintain a stable connection if the intermediate single-mode fiber infrastructure runs through multiple heavy fusion splices?

Yes, as long as the cumulative insertion loss across all splices does not exceed the maximum optical link budget allocated for this 20km transceiver.

Can I deploy this module in an indoor climate-controlled server room without worrying about humidity limitations?

Yes, the module is sealed to function flawlessly in standard commercial environments with operating relative humidity levels ranging from 5% up to 85% non-condensing.

Can I plug this SFP transceiver into a SONET multiplexer line card instead of an Ethernet switch?

Absolutely, this module fully supports the 155Mbps physical layer requirements for SONET OC-3 optical infrastructures.

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D-Link DEM-220T-D Compatible LINK-PP 155M SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module

Name: D-Link DEM-220T-D Compatible LINK-PP 155M SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 214607
Price: 5.676 USD
Availability: InStock
Rating: 4.9 (26 reviews)

# 214607

Product: D-Link DEM-220T-D Compatible LINK-PP 155M SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
SKU: 214607
P/N: LS-BL553101-20C
Price: $ 6.6
Stock: 1985 in Stock
Sold: 2.3K
Product URL: https://www.l-p.com/products/478161.htm

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Manufacture: LINK-PP

P/N: LS-BL553101-20C

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Brocade; D-Link; Extreme; Generic; Netgear

Compatible P/N:: DEM-220R-U | 20km; DEM-220T-D | 20km

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D-Link DEM-220T-D Compatible LINK-PP 155M SFP Specifications

DEM-220T-D redefines efficient data bridging as a commercial-grade 155M SFP BiDi single-mode optical transceiver, mastering 20km spans via a 1550nm-TX/1310nm-RX wavelength split while feeding live metrics through integrated Digital Diagnostic Monitoring from 0°C to 70°C.

D-Link Part Number	DEM-220T-D	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1550nm-TX/1310nm-RX	Max Cable Distance	20km
Connector	Simplex LC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-14 to -8dBm	RX Power	-32 to -6dBm
Receiver Sensitivity	< -32dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: How does the latching mechanism handle dense line-card layouts where physical space between ports is minimal? By B***r on 2026-02-05

A: The module features a robust, low-profile bail latch that pull-releases smoothly, preventing physical interference or damage to adjacent simplex LC connectors during hot-swapping. By admin on 2026-02-06
Q: Can this 155M SFP BiDi optical module maintain a stable connection if the intermediate single-mode fiber infrastructure runs through multiple heavy fusion splices? By C***e on 2025-11-28

A: Yes, as long as the cumulative insertion loss across all splices does not exceed the maximum optical link budget allocated for this 20km transceiver. By admin on 2025-11-29
Q: Can I deploy this module in an indoor climate-controlled server room without worrying about humidity limitations? By A***t on 2025-09-12

A: Yes, the module is sealed to function flawlessly in standard commercial environments with operating relative humidity levels ranging from 5% up to 85% non-condensing. By admin on 2025-09-13
Q: Can I plug this SFP transceiver into a SONET multiplexer line card instead of an Ethernet switch? By D***t on 2025-08-04

A: Absolutely, this module fully supports the 155Mbps physical layer requirements for SONET OC-3 optical infrastructures. By admin on 2025-08-05

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N***t

Singapore

Verified Purchase

5 .0

2026-04-28

Crucial feature for our network operations center (NOC). We can track the TX/RX optical power directly from our SNMP dashboard. No bugs, no glitches.

37 Helpful vote Comments

B***n

Ukraine

Verified Purchase

5 .0

2026-04-12

Installed 50 of these in our corporate HQ server room. Since it’s a commercial-grade 0-70°C transceiver, it runs cool in our climate-controlled environment. No overheating issues at all.

56 Helpful vote Comments

T***y

Philippines

Verified Purchase

5 .0

2026-03-02

Hard to find good quality 1550nm TX / 1310nm RX modules at this price point with full DOM support. LINK-PP is now our go-to vendor for optics.

43 Helpful vote Comments

I***d

Taiwan, Province of China

Verified Purchase

5 .0

2026-02-09

Great fit, clean link, and the DOM readout is stable all day.

31 Helpful vote Comments

Q***n

United States

Verified Purchase

5 .0

2026-01-27

BiDi technology is magic. Converted our dual-fiber setup into two independent single-fiber links using these Simplex LC SMF optics. Saved us thousands in infrastructure costs.

17 Helpful vote Comments

E***r

Singapore

Verified Purchase

4 .0

2026-01-08

Excellent 155M BiDi SFP optics for our campus network upgrade. The simplex LC connection saved our fiber budget. Docking one star because FedEx delayed the delivery by 24 hours, missing our scheduled maintenance window. The Product itself is flawless though.

25 Helpful vote Comments

K***n

Ukraine

Verified Purchase

5 .0

2025-12-19

Using these alongside the matching 1310nm-TX peer modules. The 20km budget provides plenty of headroom for our intra-city ring network. Will buy again for next quarter's upgrades.

51 Helpful vote Comments

J***d

South Africa

Verified Purchase

5 .0

2025-10-28

Needed to maintain some older 155Mbps optical access nodes. Finding reliable 1550nm-TX BiDi SFPs can be tough nowadays, but LINK-PP delivered exactly what we needed.

29 Helpful vote Comments

S***t

Poland

Verified Purchase

5 .0

2025-09-05

Single-mode fiber connection clicked in perfectly with the simplex LC connector. Snug fit, no dust cap issues. Standard 155M speed is rock solid.

38 Helpful vote Comments

M***e

Thailand

Verified Purchase

4 .0

2025-08-05

Forgot to include the printed datasheet. Modules work great at 1550nm-TX/1310nm-RX as advertised, and the switches recognized them instantly. However, our shipment didn’t include the printed technical specification sheets we requested for our engineering logs. Customer service emailed the PDFs immediately, but it would have been better in the box.

40 Helpful vote Comments

O***y

Sweden

Verified Purchase

5 .0

2025-06-01

Link came up on our SMF run first try and stayed solid. ✨

18 Helpful vote Comments

R***m

Romania

Verified Purchase

5 .0

2025-04-09

The 1550nm-TX / 1310nm-RX pairing was correct for our BiDi pair, so setup was painless.

23 Helpful vote Comments

B***o

Spain

Verified Purchase

5 .0

2024-09-17

I just placed an order with 50 pcs 10G Sfp Cage. You guys shipped them to me in the same day. Actually it's really urgent for me and I appreciate your Fast shipment. Will order it continually for my projects.

70 Helpful vote Comments

B***f

Netherlands

Verified Purchase

5 .0

2024-09-16

i get the best selection and price

21 Helpful vote Comments

I***f

Argentina

Verified Purchase

5 .0

2024-05-21

The delivery was quick, and without problems.

74 Helpful vote Comments

B***v

United States

Verified Purchase

5 .0

2024-04-21

This is my go-to site for ordering high quality optics, especially customized ones. They always have the best prices and a great selection.

49 Helpful vote Comments

R***p

France

Verified Purchase

5 .0

2024-03-01

Product as advertised and well within the promised delivery date

43 Helpful vote Comments

D***r

Ireland

Verified Purchase

5 .0

2024-02-11

Just as described, shipped out in a timely manner.

45 Helpful vote Comments

G***g

Morocco

Verified Purchase

5 .0

2024-01-06

Worked perfectly.

28 Helpful vote Comments

D***n

Indonesia

Verified Purchase

5 .0

2023-07-17

Everything has always arrived on time and in excellent condition. They are always there to help with any questions or concerns.

96 Helpful vote Comments

I***i

Germany

Verified Purchase

5 .0

2023-06-21

Very courtesy and polite customer service.

15 Helpful vote Comments

J***g

Brazil

Verified Purchase

5 .0

2023-06-18

Items easy to find with a good description.

12 Helpful vote Comments

B***n

Singapore

Verified Purchase

5 .0

2023-05-15

The price was low but the quality was better than expected. They were an excellent value for my money. Highly recommend!

25 Helpful vote Comments

E***p

United States

Verified Purchase

5 .0

2023-05-06

Easy to place orders and reliable. I have used them to buy fiber products for many years.

24 Helpful vote Comments

S***g

Brazil

Verified Purchase

5 .0

2023-04-22

HAPPY! Happy with the service and the product.

42 Helpful vote Comments

S***n

Macao

Verified Purchase

5 .0

2023-04-19

It was supposed to work before but because of the issue I faced, I made an assumption. I was wrong, but later tests I ran made me re-evaluate. Actually, your Optical Transceiver Module allows me to support alternatives that were not available previously. I do not know why it was not working initially. But I'm all to happy to have it all working now.

33 Helpful vote Comments