TNEWS... articles about innovation and telecommunication

V5.2 Protocol Architecture

V5.2 is a way of interfacing the Access Network (AN) to the Local Exchange (LE)

The protocol stack of V5.2 interface is used to connect the access networks (AN) to local exchanges (LE) or TDM Digital Switch.

Introduction to Planar Magnetic PCB Design

Planar Magnetic PCB Design

To address an ever-increasing demand for more power in less space, designers are turning to Planar Magnetics as an attractive alternative to conventional core shapes where low-profile magnetic devices are required.

PCB Routing Methods

Printed circuit boards routing methods

Printed circuit boards routing has ranged from layout by hands using tape on Mylar to autorouting of all nets. The methods chosen have been driven by market place pressures and product complexity as well as the skill of the PCB designer.

Pros and Cons of VoIP Phone (SIP) Adapter

A real budget device that allows you to start access to IP telephony services.

Does it make sense to change TDM to IP?

alternative way of development, IP-telephony, construction of NGN

IP-technology approved by the communications market stronger with each passing year. Already no one doubts that the future belongs to IP networks that will keep pace with the ever-growing needs of network users, as opposed to TDM networks that already today are outdated. Is it possible to “painless” transition, we consider in this article.

SS7 to SIP

SS7, an individual network, telephone connection

SS7 – is an individual network, so voice and data are transmitted one-way, all the signals it sends completely different. Before there was a network of SS7, telephone connection going through the same channels on which there was talk of subscribers. The fact that the user information and signals transmitted at different times. Has contrast SS7 ISDN. The latest network subscribers and switches can send each other signaling channel D, and here in the SS7 this exchange of information is possible only between network components.

SS7 to SIP: how does it work

SS7, architecture for performing out-band signaling

SS7 is architecture for performing out-band signaling in support of the creation of call billing, routing information exchange functions of the PSTN (public switched telephone network). SS7 is what functions are executed common channel signaling network, as well as what protocols tedious for its successful execution.

How VoIP GSM Gateway works

Live broadcast, telephone signal, from IP network

VoIP-GSM gateway is also called SIP-GSM gateway. It is a device that is responsible for the live broadcast of the telephone signal from the IP network to the cellular network, and then back again. Through this process of saving mechanisms are consistent and they are implemented through the use of GSM-gate together with office phone systems, which are based on VoIP-technology.

VoIP codecs

Description and types of codecs

Codecs is different mathematical models are used for digital compression and analog audio coding. Most of these mathematical models based on the fact that the human brain has the ability to form an overall impression even from incomplete information. After all, in fact, our brain interprets us what we want to hear, rather than what we actually hear. Exactly the same happens with optical illusions.

Why is a good board stackup important?

A successful PCB design depends on the Stackup design

Proper stackup design is important because it forms the basis of a successful printed circuit board (PCB) design. Newer ICs today have edge rates in the sub-nanosecond range.