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2009 Master Catalog 1.0

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Unicom Ethernet Switches > Ethernet Switches

How auto-negotiation works

IEEE 802.3 NWay Auto-negotiation is a data communications protocol used with Ethernet switches, routers and media converters. The NWay protocol was developed so Ethernet devices, which support multiple

transmission speeds such as a 10/100, can operate more efficiently. This protocol automatically selects the highest possible common transmission speed between two Ethernet switches, routers or media converters

and automatically sets that speed on the port.

Benefits of using NWay Auto negotiation (also referred

to as auto-sensing or auto-negotiation) include:

• Network connections that automatically choose the

highest performance levels without the need for costly

and time consuming manual port configurations.

• Guaranteed network uptime and resiliency. If the

NWay protocol detects that a device that is being

attached is not of the same technology (i.e. Token

Ring to Ethernet connection) the port will not

allow a connection or data transfer saving the

network from potentially catastrophic downtime.

• NWay Auto negotiation is backward compatible

with 10Mbps only Ethernet devices.

Prior to connecting a network device, the link,

activity and speed LEDs are not lighted

(inactive).

Upon connecting a network device to port 1 of

the switch, NWay Auto-Negotiation automatically

detects that the connected device is operating at

100Mbps and sets switch port 1 to that speed.

The green 100 LED indicates this status.

When a network device is connected that is

running at 10Mbps, the 100 LED indicator will

not light up indicating NWay Auto Negotiation

has set the local switch port to 10Mbps.

Green power light

Green

No light

Item # Description List Price

Unicom's Unmanaged 10/100Mbps Ethernet Switches - 5 or 8 RJ45 Ports

The Mini-Switch 5 and 8 are super compact 10/100Base-TX switches. These parts represent the newest generation in Ethernet switching technology

by supporting both 10 and 100Mbps speeds, half or full-duplex transmission modes and auto MDI/MDIX crossover checking. Units include a 9 VDC power

supply.

SWTC-32005T Unicom 5 Port 10/100Mbps Unmanaged Ethernet Switch 25.00

SWTC-32008T Unicom 8 Port 10/100Mbps Unmanaged Ethernet Switch 30.00

Unicom's Unmanaged 10/100Mbps Ethernet Switches - 16 or 24 Ports

Unicom's Dyna-Switch Series 16 and 24 port unmanaged Ethernet switches are an affordable and efficient way to upgrade a network. With sixteen or

twenty-four 10/100Mbps ports with MDI/MDIX, these switches will fit neatly on a desktop or can be rack mounted with the included mounting brackets.

With full duplex operation, the switches can increase the bandwidth of the 10Mbps Ethernet port and the 100Mbps fast Ethernet port to 20Mbps and

200Mbps, respectively. This switch supports IEEE 802.3 full-duplex flow control and half-duplex backpressure congestion control.

FEP31016T Unicom 16 Port 10/100Mbps Unmanaged Ethernet Switch 99.00

FEP31024T Unicom 24 Port 10/100Mbps Unmanaged Ethernet Switch 101.86

Unicom DynaGST 24 Port Gigabit Switch with SFP slots

The DynaGST 2402G Gigabit Ethernet switches are an ideal solution for solving traffic congestion at the core of the network. They offer auto-negotiating

10/100/1000Base-T Gigabit Ethernet ports that can significantly improve your network backbone performance. The DynaGST switches provide two mini

GBIC Gigabit slots for Gigabit speed network connections. The DynaGST Gigabit Ethernet switches feature an Auto MDI/MDIX function for each port and

support store-and-forward switching.

GEP33224T-1 24 Port 10/100/1000Base-T with Two Slots for SFP (Mini) GBICs 429.00

GEP22000S-L GBIC SFP Transceiver, 1000SX, LC, Multimode, 500m 99.00

GEP22100L-L GBIC SFP Transceiver, 1000LX, LC, Single mode, 10km 199.00

Unicom 24 Port 10/100/1000Base-T Managed Switch with 4 SFP Slots

Unicom's SmartGST-2404GM managed switch is the newest generation of fast Ethernet switching technology. Twenty-four 10/100/1000Base-T auto

sensing, auto MDI/MDIX ports provide a completely flexible high-performance non-blocking full wire speed solution. Enhanced by its many features

including SFP GBIC ports, VLAN tagging, port trunking, spanning tree, and broadcast storm filters, this switch is an ideal solution for campus and

enterprise networks.

GEP66424T 24 Port 10/100/1000Base-T Managed Switch with 4 SFP Slots 479.00

GEP22000S-L GBIC SFP Transceiver, 1000SX, LC, Multimode, 500m 99.00

GEP22100L-L GBIC SFP Transceiver, 1000LX, LC, Single mode, 10km 199.00

Unicom 8 Port 10/100 Managed Switch with 1000Base-T Port and SFP Slot

Unicom's SmartGST-900M managed switch is the newest generation of fast Ethernet switching technology. Eight 10/100Base-TX auto sensing, auto

MDI/MDIX ports provide a completely flexible high-performance non-blocking full wire speed solution. Enhanced by its many features including one SFP

GBIC port, one 1000Base-T port, VLAN tagging, port trunking, spanning tree, and broadcast storm filters, this switch is an ideal solution for campus and

enterprise networks. The SmartGST-900M management features also include port-based, dynamic and static VLANs, GVRP, IGMP Snooping, port

mirroring and port security. The SFP GBIC and 1000Base-T port offer high-speed long haul connections that eliminate bottlenecks to create the ideal

backbone.

GEP63109T 8 Port 10/100 Managed Switch with 1000Base-T Port and SFP Slot 329.00

GEP22000S-L GBIC SFP Transceiver, 1000SX, LC, Multimode, 500m 99.00

GEP22100L-L GBIC SFP Transceiver, 1000LX, LC, Single mode, 10km 199.00

SWTC-32005T

(Front View)

SWTC-32005T

(Rear View)

SWTC-32008T

(Front View)

SWTC-32008T

(Rear View)

GEP33224T-1

GEP66424T

FEP31024T

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GEP63109T

GEP22000S-L

FEP31016T

FEP31024T

GEP63109T

GEP22000S-L

GEP22100L-L

GEP33224T-1

SWTC-32005T

SWTC-32008T

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