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Silicom PEG2BPi RoHS Dual Port Cisco Gigabit PCIE Ethernet Bypass Server Adapter

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Silicom Gigabit Ethernet Bypass servers adapter are PCI-Express X4 network interface cards that contains two independent Gigabit ports on one PCI-E adapter. 

Silicom's Gigabit Ethernet Bypass server adapters are designed with optical or copper bypass circuitry in order to provide maximum up time for the network . 

Silicom's Gigabit Ethernet Bypass server adapters can Bypass its Ethernet ports on a host system failure, power off, or upon software request. In Bypass mode , the connections of the Ethernet network ports are disconnected from the interfaces and switched over to the other port to create a crossed connection loop - back between the Ethernet ports. Hence, in bypass mode all packets received from one port are transmitted to other port and vice versa. This feature enables to bypass a failed system and provides maximum up time for the network. 

Silicom's Gigabit Ethernet Bypass server adapters include an on board WDT (Watch Dog Timer) controller. The adapter's software drivers or software application can write commands to the on board WDT controller. The adapter's software drivers, WDT controller and the Bypass circuitry provide an interface that control and manage the mode of the adapter. 

Silicom Gigabit Ethernet Bypass server adapters have an integrated hardware acceleration that performs TCP/UDP/IP checksum offload and TCP segmentation. The host processing offloads accelerators frees CPU for application processing.

Silicom's PXBPI-Series are adapters are based on Intel 82571 / 82546 Dual port Gigabit Ethernet MAC+PHY of Intel Controller.


  • Bypass Ethernet ports on Power Fail, System Hangs or Software Application Hangs

  • Software programmable Bypass or Normal Mode

  • On Board Watch Dog Timer (WDT) Controller

  • Software programmable time out interval

  • Software Programmable WDT Enable / Disable counter

  • Software programmable Bypass Capability Enable / Disable

  • Programmable state (Bypass mode or Normal mode) at Power up

  • Emulates standard NIC

  • Independent Bypass operation in every two ports

Copper Gigabit Ethernet 1000Base-T:

  • Independently copper Gigabit Ethernet channels support six, four, two and one Gigabit Ethernet (1000Base-T), Fast Ethernet (100Base-Tx) and Ethernet (10Base-T)

  • Triple speed 1000Mbps (1000Base-T), 100 Mbps (100Base-Tx) and 10 Mbps (100Base-T) operation

  • Nway auto negotiation automatic sensing and switching between 1Gbps full duplex and 100 / 10 Mbps operations Simplex or Full Duplex

  • RJ-45 female connectors

Common Key features:

  • Host Interface standard support:

  • Host Interface PCI-Express 4X Lane (Version 1.0a).

  • High performance, reliability, and low power use in Intel 82571 / 82546 dual integrated MAC + PHY and SERDES chip controller

  • Ultra deep packet buffer per channel lowers CPU utilization

  • Hardware acceleration that can offload tasks from the host processor. The controllers can offload TCP/UDP/IP checksum calculations and TCP segmentation

  • Priority queuing – 802.1p layer 2 priority encoding

  • Virtual LANs – 802.1q VLAN tagging

  • Jumbo Frame (16KB)

  • 802.x flow control

  • Statistics for SNMP

  • LEDs indicators for link/Activity/Bypass Mode status

Bypass Specification:

WDT Interval (Software Programmable):

3,276,800 mSec (3,276.8 Sec): Maximum
100 mSec ( 0.1 Sec) : Minimum

WDT Interval = (2^wdt_interval_parameter)*(0.1) sec.
wdt_interval_parameter: {Valid Range: 0-15}

Copper Gigabit Ethernet Technical Specifications - (1000Base-T) Adapters:

IEEE Standard / Network topology:

Gigabit Ethernet, 1000Base-T
Fast Ethernet, 100Base-TX
Ethernet, 10Base-T

Full duplex / Simplex:

Support both Simplex & Full duplex operation in all operating speeds

Auto negotiation:

Auto-negotiation between Full duplex and simplex operations and between 10Mb/s 100Mb/s speeds and duplex 1000Mb/s

Data Transfer Rate:

1000 Mbit/s, 100 Mbit/s and 10 Mbits/sec in simplex mode per port
2000Mbit/s 200 and 20 Mbit/s in full duplex mode per port

Cables and Operating distance:

10Base-T Category 3, 4, or 5 maximum 50m *
100Base-Tx Category 5 maximum 50m *
1000Base-T Category 5E maximum 50m *
*Theoretical Distance – Defined as half a distance as stated by the IEEE 802.3 standard

Operating Systems Support
Operating system support:Windows
General Technical Specifications
Interface Standard:

PCI-Express Base Specification Revision 1.0

Board Size:

PCI low profile short add in Card 167.64 mm x 63.5mm(6.6”x2.5”)

PCI Express Card Type:X4
PCI Express Voltage:

+3.3V ± 9%,
+12V ± 8%

PCI Connector:

Gold Finger: X4

Controller: :

Intel 82571EB


Metal Bracket: Full Height and low profile


100 gram (3.53 Oz)

Power Consumption:

Normal mode:
0.02A at 12V and 1.9A at 3.3V: Typical all ports operate at 1000Mbit/s.
0.02A at 12V and 1A at 3.3V: Typical all ports operate at 100Mbit/s.
0.02A at 12V and 0.95A at 3.3V: Typical all ports operate at 10Mbit/s.
0.02A at 12V and 0.9A at 3.3V: Typical No link at all ports.

Bypass Mode:
0.02A at 12V and 0.75A at 3.3V: Typical

Operating Temperature:0°C – 50°C (32°F - 122°F)
Storage:-20°C–65°C (-4°F–149°F)
EMC Certifications:FCC Part 15, Subpart B Class B
Conducted Emissions
Radiated Emissions
CE EN 55022: 1998 Class B Amendments A1: 2000; A2: 2003
Conducted Emissions
Radiated Emissions
CE EN 55024: 1998 Amendments A1: 2000; A2: 2003 Immunity for ITE Amendment A1: 2001
CE EN 61000-3-2 2000, Class A
Harmonic Current Emissions
CE EN 61000 3-3 1995, Amendment A1: 2001
Voltage Fluctuations and Flicker
CE IEC 6100-4-2: 1995
ESD Air Discharge 8kV. Contact Discharge 4kV.
CE IEC 6100-4-3:1995
Radiated Immunity (80-1000Mhz), 3V/m 80% A.M. by 1kHz
CE IEC 6100-4-4:1995
EFT/B: Immunity to electrical fast transients 1kV Power
Leads, 0.5Kv Signals Leads
CE IEC 6100-4-5:1995
Immunity to conductive surges COM Mode; 2kV,Dif. Mode 1kV
CE IEC 6100-4-6:1996
Conducted immunity (0.15-80 MHz) 3VRMS 80% A.M. By 1kHz
CE IEC 6100-4-11:1994
Voltage Dips and Short Interruptions
V reduc >95%, 30% >95% Duration 0.5per, 25per, 250per
MTBF:111 (Years)
*According to Telcordia SR-332 Issue 1
Environmental condition – GB (Ground, Fixed, Controlled). Ambient temperature - 25°C. Temperature rise of 15°C above the system ambient temperature was assumed for the cards components

(3) LEDs per port
Link/Activity: Turns on any link speed, blinks on activity (green).
100: Turns on 100 Mbit/s link (green).
1000: Turn on 1000 Mbit/s link (green).
Bypass: LED 1000 and LED 100 are turn on

LEDs location:LEDs are located on the PCB, visible via holes in the metal bracket holder
Connectors:(2) Shielded RJ-45
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