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Common Logic Level Standard

This article mainly introduces the common logic level standards, such as CMOS, LVCMOS, TTL, LVTTL, LVDS, PECL / LVPECL, CML, VML, HSTL, SSTL, etc. LVPECL: Highest rate: LVPECL is 10 + Gbps CML: Maximum rate: 10 + Gbps Coupling mode:Dc coupling is used between CML and CML ... Read More

DHCP Dynamic Host Allocation Protocol

HCP dynamic host allocation protocol is widely used in daily Internet access, such as the home Internet router is a DHCP server. When we set the client to automatically obtain the IP address, the DHCP server assigns the IP address to the client according to the DHCP protocol. ONU can also be used... Read More

The Dying gasp of ONU

Dying gasp means that when the system voltage cannot meet the normal operation of the system, the system will automatically send a signal to the head end to tell the head end that the ONU may not work properly, and the head end will give a reaction to release the channel originally arranged for t... Read More

Broadband and Dial-up

We used to use ADSL broadband. ADSL: Asymmetric Digital Subscriber Line. Broadband is used by connecting a phone line from your broadband carrier to your indoor modem (commonly known as a cat) and then using the cable to connect to other Internet-connected devices.  After years of development, AD... Read More

The Difference between protocol and protocol stack

 The definition of the protocol is the communication label of the column, the two sides of the communication need to jointly carry out the normal data transmission according to this standard. In computer communication, the communication protocol is used to realize the labeling between the compute... Read More

VLAN Isolation Function of Ethernet Switch

Before understanding the VLAN isolation function of the switch, we first understand the Ethernet switch: Ethernet switch is a switch based on Ethernet data transmission. Each port of the Ethernet switch can be connected to the host, generally working in full-duplex mode, and can be connected to t... Read More