SAMSUNG 4 DAY SALE

Save on select cell phones, tablets, accessories and more.

Shop now ›

Ends Saturday.

Current Offers
  • (68)
  • (26)
Brand
  • (18)
  • (17)
  • (12)
  • (12)
  • (5)
  • (3)
  • (2)
  • (1)
  • (1)
  • (1)
  • (1)
  • (1)
Price
  • (35)
  • (14)
  • (6)
  • (4)
  • (4)
  • (10)
  • (1)
Color
  • (4)
  • (2)
Condition
  • (74)

Networking Resources


Networking Questions

Ask fellow shoppers and Best Buy staff. Share your answers.

Sort by:
Items per page:
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$27.17
On Sale
Save $6.82 (Reg. $33.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1309422548
2 x 9-pin DB-9 Male RS-232/422/485 Serial Universal PCI
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$134.11
On Sale
Save $25.88 (Reg. $159.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1310294998
1 x 9-pin Male RS-232 Serial, 1 x 9-pin Male RS-422/485 Serial Universal PCI
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$129.99
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1310785847
PCI Express x1 - 4 x DB-9 Male RS-232/422/485 Serial Via Cable - Plug-in Card
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$99.24
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$42.54
On Sale
Save $17.45 (Reg. $59.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1309428236
1 x 9-pin DB-9 Male RS-232 Serial PCI - 1 Pack
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$21.99
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • Model: PCI2S550-L
  • SKU: 1538166
PCI interface; up to 115 Kbps data transfer rates; adds 2 RS-232 serial ports; 16-byte FIFO buffer; IRQ sharing

Best Buy is dedicated to always offering the best value to our customers. We will match the price, at the time of purchase, on a Price Match Guarantee product if you find the same item at a lower price at a Designated Major Online Retailer or at a local retail competitor's store.

Here's how:
  • If you find a qualifying lower price online, call 1-888-BEST BUY and direct a customer service agent to the web site with the lower price, or when visiting a Best Buy store, one of our employees will assist you.
  • On qualifying products, Best Buy will then verify the current price to complete the price match.

Some exclusions apply. See the list of Designated Major Online Retailers and full details.

$31.99
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • Model: PCI2S950DV
  • SKU: 9977573
Fits most PCs with a PCI slot; creates one 16C950 UART channel; up to 460 Kbps data transfer rate

Best Buy is dedicated to always offering the best value to our customers. We will match the price, at the time of purchase, on a Price Match Guarantee product if you find the same item at a lower price at a Designated Major Online Retailer or at a local retail competitor's store.

Here's how:
  • If you find a qualifying lower price online, call 1-888-BEST BUY and direct a customer service agent to the web site with the lower price, or when visiting a Best Buy store, one of our employees will assist you.
  • On qualifying products, Best Buy will then verify the current price to complete the price match.

Some exclusions apply. See the list of Designated Major Online Retailers and full details.

$32.99
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$26.67
On Sale
Save $58.93 (Reg. $85.60)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$179.54
On Sale
Save $43.45 (Reg. $222.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1308970668
PCI Express x1 - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$76.74
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1307726365
PCI interface; up to 115 Kbps data transfer rates; adds 2 RS-232 serial ports; 16-byte FIFO buffer; IRQ sharing
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$35.96
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$119.21
On Sale
Save $31.78 (Reg. $150.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1310217805
2 x RS-232/422/485 Serial, 2 x 9-pin DB-9 RS-232/422/485 Serial PCI Express x1
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$32.02
On Sale
Save $59.97 (Reg. $91.99)
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

  • SKU: 1310809857
2 x 9-pin DB-9 Male RS-422/485 Serial Universal PCI
What is Marketplace?

Marketplace Items

  • are sold and shipped by Best Buy-approved third party retailers using our secure checkout; your credit card information stays with Best Buy
  • are not available in Best Buy stores
  • can only be returned to the Marketplace Seller

Learn More

$67.74
You may compare up to four items at a time.

Would you like to continue with the first four items you've selected?

No Thanks | Yes, continue to compare

Select 2 to 4 items to Compare