Why Forced 1000Full Causes Duplex Mismatch and CRC Errors

A one-end-forced, one-end-auto link drops to half-duplex and...

2026-09-29

Store-and-Forward vs Cut-Through: How Switch Forwarding Modes Differ

Store-and-forward checks CRC and drops bad frames; cut-throu...

2026-09-29

Why GPON Enables FEC Downstream but Not Upstream

GPON FEC is on downstream to beat broadcast bit errors but o...

2026-09-28

Why Industrial Switches Must Pass IEC 61000-4 Immunity Tests

IEC 61000-4 sets the ESD, EFT, surge and radiated-immunity b...

2026-09-28

PoE Power Negotiation: 802.3af/at/bt Class and the LLDP Handshake

PoE power negotiation uses 802.3af/at/bt detection, class an...

2026-09-28

PROFINET & EtherNet/IP: Spanning Tree Protocol on Industrial Switches

PROFINET and EtherNet/IP demand 802.1p priority, LLDP, IGMP ...

2026-09-27

SCADA Needs a Managed PoE Switch With No Single Point of Failure

A SCADA network cannot tolerate a single point of failure. B...

2026-09-27

How an Industrial Switch Carries Modbus TCP Without Dropping Packets

Modbus TCP lets PLCs, HMIs and SCADA talk over Ethernet. An ...

2026-09-27

What Is PPPoE? How FTTH Authenticates and Bills Subscribers

PPPoE (RFC 2516) gives FTTH one session per subscriber: the ...

2026-09-24

What Is DHCP Snooping? How Switches Block Rogue DHCP Servers

DHCP Snooping blocks rogue DHCP servers: trusted ports reach...

2026-09-24

RSTP vs STP: How Spanning Tree Stops Network Loops

RSTP (IEEE 802.1w) is the fast successor to STP (802.1D) tha...

2026-09-24

What Is MQTT? Benefits and Use Cases for Industrial IoT

MQTT is a lightweight publish/subscribe protocol (OASIS, por...

2026-09-23

OLT PON and Uplink Isolation: Stop Network Loops and Broadcast Storms

OLT PON and uplink isolation keep subscribers apart and bloc...

2026-09-23

What Is LLDP? Benefits and Use Cases for Industrial Networks

LLDP (IEEE 802.1AB) auto-discovers neighbor devices on Layer...

2026-09-23

How to Test a PON Link: OLT Test with Power Meter, VFL and OTDR

Test a PON link with an optical power meter (dBm), a visual ...

2026-09-22

GPON Network Inspection Checklist: 5 Steps Before a Fault Happens

GPON network inspection checklist: read Rx power first (aler...

2026-09-22

GPON OLT SFP Optical Module Power Class: C+ to C++++ in One Table

GPON OLT optical module power class runs C+ to C++++: budget...

2026-09-22

GPON ONU Buyer's Guide: How to Choose GPON, XPON and 10G ONU

GPON ONU buyer's guide: match the PON standard first, then p...

2026-09-21

Managed Industrial Ethernet Switch TCO: The Real 5-Year Cost

Managed Industrial Ethernet Switch TCO: The Real 5-Year Cost...

2026-09-21

PON Capacity Planning: How Many GPON OLTs for N Subscribers

PON capacity planning in one formula: total bandwidth = subs...

2026-09-21