Switches and Hubs
Switches and Hubs represent networking devices used to connect multiple devices in a local area network (LAN). Hubs operate at the physical layer of the OSI model, allowing devices to communicate with each other by forwarding data packets to all connected devices. On the other hand, Switches operate at the data link layer, ensuring efficient data transmission by forwarding packets only to the intended recipient. Switches and Hubs play a crucial role in creating a reliable and secure network infrastructure, improving overall network performance and speed. These devices are essential in managing network traffic, enhancing connectivity, and facilitating seamless communication between devices.
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Black Box FT1-4 MTX-P Voice Data T1 FT1 External Multiplexer 4-Channel V2.04
Black Box
$50.00Was: $100.00Black Box FT1-4 MTX-P Voice Data T1 FT1 External Multiplexer 4-Channel V2.04A 4-channel voice and data multiplexer for T1/FT1 lines operating at 1.544 Mbps. This unit combines multiple voice and data channels onto a single T1 connection for...31577- SKU:
- 31577
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 10.00 LBS
- Brand:
- Black Box
- Model:
- FT1-4
- MPN:
- MTX-P
- Secondary Model:
- MTX-P
- SKU:
- 31577
- Type:
- Voice-Data T1/FT1 External Multiplexer
- Number of Channels:
- 4
- Interface Type:
- T1 / FT1
- Data Rate:
- 1.544 Mbps (T1)
- Network Interface:
- RJ-45 (Network port, rear panel)
- Channel Interfaces:
- DB-25 (Ch 3 & 4); RJ-style (Ch 1 & 2)
- Management Ports:
- Printer, Terminal, AUX (rear panel)
- Level/Attenuation:
- LBO: 0 dB, -7.5 dB, -15 dB selectable
- Firmware Version:
- V2.04 C
- Front Panel:
- LCD display; Network: TEST, CARRIER, SYNC, ALARM LEDs; Channel: TEST, TD, RD, RTS, CD LEDs; 4-button keypad
- Form Factor:
- Desktop / Tabletop
- Country/Region of Manufacture:
- United States
- Condition:
- Used – Inspected and in Good Condition
- Seller Notes:
- Unit only; inspected and in good condition. Firmware V2.04 C displayed on LCD.
- Condition Notes:
- Black Box FT1-4 MTX-P T1 Multiplexer inspected and in good condition. Normal cosmetic wear. LCD displays firmware V2.04 C. ALARM LED lit in photos — note before purchasing. Rear connectors intact.
$50.00Was: $100.00 -
Tutankhamon MB400 4-Port Thin Ethernet Coax Repeater 10Base2 BNC AUI No AC
Tutankhamon Electronics
$35.00Was: $70.00Tutankhamon MB400 4-Port Thin Ethernet Coax Repeater 10Base2 BNC AUI No AC AdapterA 10Base2 Thin Ethernet repeater designed to extend and connect multiple coaxial network segments. This unit amplifies and retransmits signals across four BNC ports and one...31352- SKU:
- 31352
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 2.00 LBS
- Brand:
- Tutankhamon Electronics
- Model:
- MB400
- MPN:
- MB400
- Type:
- Thin Ethernet Coax Repeater
- SKU:
- 31352
- Condition:
- Used – Inspected
- Number of Ports:
- 4 BNC + 1 AUI
- Interface Type:
- 10Base2 (Thin Ethernet / Thinnet)
- Connector Type:
- BNC (x4), AUI DB15 (x1), DIN Power
- Network Standard:
- 10Base2, IEEE 802.3
- Data Rate:
- 10 Mbps
- Form Factor:
- Desktop
- Indicators:
- Data LED, Fault LED
- Power:
- External AC adapter (not included)
- Seller Notes:
- No AC adapter included. Unit only.
- Condition Notes:
- Tutankhamon MB400 4-Port Thin Ethernet Coax Repeater. Inspected, good condition. BNC and AUI ports appear clean. No AC adapter included. Please view photos and contact us with any questions.
$35.00Was: $70.00 -
Linksys PASB421 4-to-1 Bi-Directional Compact Auto Switch ProConnect Parallel
Linksys
$20.00Was: $40.00Linksys PASB421 4-to-1 Bi-Directional Compact Auto Switch ProConnect ParallelThis is a desktop parallel port switch that connects four PCs or peripherals to a single printer, or one PC to four printers. The unit automatically switches connections and...30022- SKU:
- 30022
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 3.00 LBS
- Brand:
- Linksys
- Model:
- PASB421
- MPN:
- PASB421
- Type:
- 4-to-1 Bi-Directional Compact Auto Switch
- SKU:
- 30022
- Product Series:
- ProConnect
- Switch Configuration:
- 4-to-1 or 1-to-4 (bi-directional)
- Interface Type:
- Parallel (DB25)
- Connector Type:
- DB25 Female
- Number of Ports:
- 5 (1 printer + 4 PC ports)
- Form Factor:
- Compact Desktop
- Compatible With:
- Parallel port printers and PCs with DB25 parallel ports
- Switching Mode:
- Automatic
- Form Feed Support:
- Selectable via DIP switch
- Country/Region of Manufacture:
- Taiwan
- Condition:
- Used – Pulled from Working Environment
- Seller Notes:
- Unit only; no power adapter or cables included
- Condition Notes:
- Linksys PASB421 Compact Auto Switch in good used condition. Light surface scuffs from prior use; housing intact, no cracks. All DB25 ports and DIP switch present. Please contact us with any questions.
$20.00Was: $40.00 -
AirLink+ ASW108/A4 8-Port 10/100 Mbps Ethernet Switch Unmanaged w/ Power Supply
Air Link
$15.00Was: $30.00AirLink+ ASW108/A4 8-Port 10/100 Mbps Ethernet Switch Unmanaged w/ Power SupplyThe AirLink+ ASW108/A4 is a compact, unmanaged 8-port Fast Ethernet switch designed for home and small office network connectivity. It supports both 10BASE-T and 100BASE-TX on...28847- SKU:
- 28847
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 5.00 LBS
- Brand:
- AirLink+
- Model:
- ASW108/A4
- MPN:
- ASW108/A4
- Type:
- Unmanaged Ethernet Switch
- SKU:
- 28847
- Number of Ports:
- 8
- Port Speed:
- 10/100 Mbps (10BASE-T / 100BASE-TX)
- Management Type:
- Unmanaged
- Form Factor:
- Desktop
- Power Requirements:
- 7.5VDC / 1A (external adapter)
- Connector Type:
- RJ-45
- Standards:
- IEEE 802.3, IEEE 802.3u
- Seller Notes:
- Includes LEI Class 2 power supply, model 410710OO3CT
- Country/Region of Manufacture:
- Taiwan
- Condition:
- Used – Inspected and in Good Condition
- Compatible With:
- Home and small office 10/100 Ethernet networks
- Condition Notes:
- AirLink+ ASW108/A4 8-Port 10/100 Mbps Ethernet Switch. Inspected and in good used condition. Includes LEI Class 2 power supply (410710OO3CT). Light surface wear. Please contact us with any questions.
$15.00Was: $30.00 -
Encore ESH-708 8-Port Mini Hub XZ850519T 10Mbps Desktop Ethernet Network Hub
Encore
$18.00Was: $40.00Encore ESH-708 8-Port Mini Hub XZ850519T 10Mbps Desktop Ethernet Network HubAn unmanaged 8-port Ethernet hub for connecting multiple devices on a 10BaseT network. This desktop unit functions as a basic network repeater, extending connectivity across...28699- SKU:
- 28699
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 3.00 LBS
- Brand:
- Encore
- Model:
- ESH-708
- MPN:
- XZ850519T
- Secondary Model:
- ESH-708\M1F
- Type:
- Ethernet Network Hub
- SKU:
- 28699
- Number of Ports:
- 8
- Port Speed:
- 10 Mbps
- Networking Standard:
- 10BaseT Ethernet
- Connector Type:
- RJ-45
- Management Type:
- Unmanaged
- Form Factor:
- Desktop
- Seller Notes:
- Includes AC adapter power supply
- Condition:
- Used – Inspected and in Good Condition
- Country/Region of Manufacture:
- China
- Condition Notes:
- Encore ESH-708 8-Port Mini Hub inspected and in good used condition. Light cosmetic wear. Includes AC adapter. All 8 RJ-45 ports appear clean and undamaged.
$18.00Was: $40.00 -
TeleProcessing Products TP-501 CSU/DSU Digital Termination Unit T1 DDS
TeleProcessing Products Inc.
$75.00Was: $150.00TeleProcessing Products TP-501 CSU/DSU Digital Termination Unit T1 DDSThe TeleProcessing Products TP-501 is a CSU/DSU (Channel Service Unit / Data Service Unit) digital termination unit designed to interface customer premise equipment with T1 and DDS...28311- SKU:
- 28311
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 7.00 LBS
- Brand:
- TeleProcessing Products Inc.
- Model:
- TP-501
- MPN:
- TP-501
- Type:
- CSU/DSU Digital Termination Unit
- SKU:
- 28311
- Interface Type:
- T1, DDS, DTE
- Loopback Modes:
- Pattern Loopback, DTE Loopback, DDS Loopback
- Front Panel Controls:
- OS button, TEST button, Pattern/DTE/DDS loopback switches
- Form Factor:
- Desktop
- Seller Notes:
- Includes AC power cable
- Condition:
- Used – Inspected and in Good Condition
- Compatible With:
- T1 and DDS digital circuits
- Condition Notes:
- TeleProcessing Products TP-501 CSU/DSU Digital Termination Unit. Inspected and in good used condition. Normal wear. Front panel controls intact. AC power cable included.
$75.00Was: $150.00 -
Sun 270-2062-04 4-Port Link Interface Card Rev B1 Quad RJ45 Ethernet Module
Sun
$75.00Was: $150.00Sun 270-2062-04 4-Port Link Interface Card Rev B1 Quad RJ45 Ethernet ModuleA 4-port Ethernet interface card designed for Sun Microsystems servers and workstations. This module adds quad RJ-45 connectivity to compatible systems via card slot installation...28207- SKU:
- 28207
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 3.00 LBS
- Brand:
- Sun Microsystems
- Model:
- 270-2062-04
- MPN:
- 270-2062-04
- Type:
- 4-Port Link Interface Card
- SKU:
- 28207
- Hardware Revision:
- Rev B1
- Number of Ports:
- 4
- Connector Type:
- RJ-45
- Interface Type:
- Ethernet
- Form Factor:
- Card / Module
- Country/Region of Manufacture:
- United States
- Compatible With:
- Sun Microsystems servers and workstations
- Condition:
- Used – Inspected, Good Condition
- Seller Notes:
- Card only; no accessories included.
- Condition Notes:
- Sun 270-2062-04 4-Port Link Interface Card inspected and in good used condition. Board is clean, RJ-45 ports and LED indicators intact, light handling wear from prior service use.
$75.00Was: $150.00 -
Black Box SR913A PS/2 KVM Switch 3-Port VGA SVGA DB-15 Rackmount KV Switcher
Black Box
$35.00Was: $70.00Black Box SR913A PS/2 KVM Switch 3-Port VGA SVGA DB-15 Rackmount KV SwitcherA 3-port KVM switch for controlling multiple computers from a single PS/2 keyboard and VGA/SVGA monitor. Allows switching between three systems without unplugging cables or...27634- SKU:
- 27634
- Availability:
- Usually ships within 1-2 business days.
- Weight:
- 9.00 LBS
- Brand:
- Black Box
- Model:
- SR913A
- MPN:
- SR913A
- SKU:
- 27634
- Type:
- KVM Switch
- Number of Ports:
- 3
- Keyboard Interface:
- PS/2
- Video Interface:
- VGA/SVGA DB-15
- Connector Type:
- PS/2, HD-15 (VGA/SVGA)
- Form Factor:
- Rack Mount
- Rack Width:
- 19 in
- Dimensions:
- 3.5H x 19W x 6D inches
- Compatible Systems:
- PS/2 keyboard + VGA/SVGA monitor PCs
- Country/Region of Manufacture:
- United States
- Condition:
- Used – Inspected and in Good Condition
- Seller Notes:
- Unit only — no cables included unless pictured
- Condition Notes:
- Black Box SR913A 3-Port PS/2 KVM Switch inspected and in good condition. Minor cosmetic wear consistent with normal use. Rear PS/2 and VGA connectors appear undamaged. Please view photos and contact us with any questions.
$35.00Was: $70.00