CHAPTER 1 GENERAL INFORMATION

System Outline

System Outline of ISDN Terminal

The system is configured with an ISDN Line Circuit (ILC) for the line interface of an ISDN Terminal and an ISDN Channel Handler (ICH) for Layer 2 protocol processing (LAP-D).

Figure 1-4and Figure 1-5show the system outline of the ISDN Terminal.

Figure 1-4 System Outline of ISDN Terminal (for ISDN-PRI)

Point to Point Connection

ISDN Terminal (TE)

Point to Multi-point Connection

TA

Data

ISDN Terminal

Terminal

(TE)

 

SLT

 

 

 

 

 

 

 

PBX

 

 

 

 

 

 

23B/30B

1.5 M/2 M PCM

 

 

2B

2

DIGITAL LINE (23B/30B + D)

 

ILC

 

DTI

NT1

ISDN

 

 

/PRT

2D

 

 

D

 

 

 

 

 

 

 

 

 

 

 

CLOCK

 

 

 

 

 

SIGNAL

 

 

2B

2

 

 

 

 

ILC

 

 

 

 

 

2D

 

 

 

 

 

 

8D

ICH

 

 

 

 

 

 

 

LC

 

 

 

 

 

DCH

TDSW

 

 

 

 

FP

MP

 

DCH

: D Channel Handler

 

(PLO)

 

 

 

 

 

 

 

 

DTI

: Digital Trunk Interface

 

 

 

 

ICH

: ISDN Channel Handler

 

 

 

ILC

: ISDN Line Circuit

 

 

 

 

LC

: Line Circuit

 

 

 

 

NT1

: Network Termination One

 

 

 

PLO

: Phase Locked Oscillator

 

 

 

PRT

: Primary Rate Interface Trunk

 

 

 

TA

: Terminal Adapter

 

NOTE 1: The following connections are only available:

ISDN Terminal to ISDN Terminal Connection

ISDN Terminal to ISDN Trunk Connection

ISDN Trunk to ISDN Terminal Connection

ISDN Terminal to Single Line Telephone Connection

NOTE 2: NT1 equipment must be installed on the premises.

Page 8

NEAX2000 IVS2 ISDN System Manual

ND-70919 (E), Issue 1.0

Page 19
Image 19
NEC ND-70919 system manual System Outline of Isdn Terminal, 4and -5show the system outline of the Isdn Terminal

ND-70919 specifications

The NEC ND-70919 is a versatile and highly regarded optical disc drive that has made significant contributions to the storage technology sector. Recognized for its durability and performance, the ND-70919 is primarily designed for users looking for a reliable solution for CD, DVD, and even Blu-ray media playback and recording.

One of the hallmark features of the NEC ND-70919 is its exceptional writing speeds. This drive is capable of burning CD-R media at speeds up to 48x, DVD+R and DVD-R at up to 16x, and dual-layer DVD media at speeds of 8x. This not only allows for rapid disc creation but also ensures high-quality data integrity during the writing process. The drive's burning technology uses advanced algorithms to reduce errors, which is crucial for data that needs to be archived.

In terms of playback, the ND-70919 supports a wide variety of formats, including CD, DVD, and various recordable formats. This flexibility ensures that users can access a broad array of media types. The drive's compatibility with both DVD-RAM and DVD+RW formats allows users the convenience to rewrite data and reuse discs, making it a cost-effective choice for those needing frequently updated storage solutions.

The NEC ND-70919 employs the latest in optical technology, featuring a sophisticated laser system that enhances both read and write speeds while also providing error correction capabilities. This technology is particularly beneficial when dealing with scratched or damaged discs, enabling the drive to maintain performance and reliability under various conditions.

Another standout characteristic is its user-friendly interface and installation process. The ND-70919 is designed to be compatible with a variety of operating systems, making it accessible for users across different platforms. It is typically equipped with a SATA interface, which provides a speedy connection to the motherboard, ensuring that data transfer rates meet modern standards.

In terms of physical characteristics, the drive has a slim and compact design, allowing it to fit seamlessly into both desktop and laptop configurations. Its aesthetic appeal is complemented by its robustness, designed to endure repeated use over time.

Overall, the NEC ND-70919 stands out as a functional and powerful optical disc drive, characterized by high writing speeds, broad format compatibility, advanced optical technologies, and ease of use, making it a popular choice among consumers seeking reliable disc storage solutions.