Chapter 6: Glossary

Chapter 6: Glossary

ARP (Address Resolution Protocol )

ARP is a TCP/IP protocol for mapping an IP address to a physical machine address that is recognized in the local network, such as an Ethernet address.

A host wishing to obtain a physical address broadcasts an ARP request onto the TCP/IP network. The host on the network that has the IP address in the request then replies with its physical hardware address.

Inverse ARP (In-ARP), on the other hand, is used by a host to discover its IP address. In this case, the host broadcasts its physical address and a RARP server replies with the host's IP address.

DHCP (Dynamic Host Configuration Protocol)

When operates as a DHCP server, the ADSL Router assign IP addresses to the client PCs on the LAN. The client PCs “leases” these Private IP addresses for a user-defined amount of time. After the lease time expires, the private IP address is made available for assigning to other network devices.

The DHCP IP address can be a single, fixed public IP address, an ISP assigned public IP address, or a private IP address.

If you enable DHCP server on a private IP address, a public IP address will have to be assigned to the NAT IP address, and NAT has to be enabled so that the DHCP IP address can be translated into a public IP address. By this, the client PCs are able to access the Internet.

LAN (Local Area Network) & WAN (Wide Area Network)

A LAN is a computer network limited to the immediate area, usually the same building or floor of a building. A WAN, on the other hand, is an outside connection to another network or the Internet.

The Ethernet side of the ADSL Router is called the LAN port. It is a twisted-pair Ethernet 10Base-T interface. A hub can be connected to the LAN port. More than one computers, such as server or printer, can be connected through this hub to the ADSL Router and composes a LAN.

The DSL port of the ADSL Router composes the WAN interface, which supports PPP or RFC 1483 connecting to another remote DSL device.

NAT (Network Address Translation) IP Address

NAT is an Internet standard that translates a private IP within one network to a public IP address, either a static or dynamic one. NAT provides a type of firewall by hiding internal IP addresses. It also enables a company to use more internal IP addresses.

If the IP addresses given by your ISP are not enough for each PC on the LAN and the ADSL Router, you need to use NAT. With NAT, you make up a private IP network for the LAN and assign an IP address from that network to each PC. One of some public addresses is configured and mapped to a private workstation address when accesses are made through the gateway to a public network.

For example, the ADSL Router is assigned with the public IP address of 168.111.2.1. With NAT enabled, it creates a Virtual LAN. Each PC on the Virtual LAN is assigned with a private IP address with default value of 192.168.2.2 to 192.168.2.254. These PCs are not accessible by the outside world but they can communicate with the outside world through the public IP 168.111.2.1.

Private IP Address

Private IP addresses are also LAN IP addresses, but are considered “illegal” IP addresses to the Internet. They are private to an enterprise while still permitting full network layer connectivity between all hosts inside an enterprise as well as all public hosts of different enterprises.

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Siemens SLI-5310-I IAD manual Glossary

SLI-5310-I IAD, SLI-5310 specifications

The Siemens SLI-5310 and SLI-5310-I Integrated Access Devices (IAD) are advanced telecommunications solutions designed to facilitate efficient connectivity and high-quality voice services over IP networks. These devices stand at the intersection of traditional telephony and modern IP-based communications, offering a robust solution for businesses requiring integrated voice and data services.

One of the main features of the Siemens SLI-5310 is its ability to support multiple communication protocols, making it versatile for various network environments. This device can handle both TDM (Time Division Multiplexing) and VoIP (Voice over Internet Protocol), allowing organizations to transition smoothly from legacy systems to modern IP solutions. The SLI-5310-I variant extends these capabilities further by offering integrated router functionalities, ensuring reliable data transfer alongside voice services.

The SLI-5310 supports a range of interfaces, including analog and digital ports, enabling connection with various telephone types and devices. This flexibility ensures that businesses can leverage their existing telecommunications infrastructure while upgrading to newer technologies. The device is also equipped with advanced echo cancellation and voice compression technologies, improving voice quality and minimizing latency during calls.

In terms of management and monitoring, the Siemens SLI-5310 series comes with a user-friendly interface, which allows administrators to configure and manage settings seamlessly. Built with advanced security features, these IADs protect against potential threats, ensuring that both voice and data communications remain secure. Encryption protocols and support for VPNs (Virtual Private Networks) further enhance the security framework.

In summary, the Siemens SLI-5310 and SLI-5310-I IADs are versatile communications solutions that combine traditional and modern technologies to deliver high-quality voice and data services. With support for multiple interfaces, advanced voice processing capabilities, and robust security measures, these devices cater to the evolving needs of businesses looking for reliable telecommunications solutions. Their ability to integrate seamlessly into existing networks while offering scalability makes them an ideal choice for enterprises aiming to future-proof their communication systems.