CHAPTER 5 OPERATION TEST

 

 

 

 

 

Interoffice Transmission Line Test

 

 

 

 

 

 

 

Table 5-1 Alarm Indications on 24DTI

 

 

 

 

 

 

LED

LED INDICATION

 

 

FAULT

 

 

 

 

 

NORMAL

FAULT

CAUSE

 

ACTION

 

 

 

 

 

 

 

 

RUN

Flash

On or Off

Abnormal

1

Confirm the programming data:

 

(120 IPM)

 

operation of DTI

 

CM05, CM07 YY=01.

 

 

 

card

2

Check to see if the SENS

 

 

 

 

 

switch is set as per the AP

 

 

 

 

 

number (04-15, 20-31)

 

 

 

 

 

assigned by CM05.

 

 

 

 

3

Reset the MB switch

 

 

 

 

 

(DownUpDown)

 

 

 

 

4

If the fault cannot be cleared,

 

 

 

 

 

replace the card.

 

 

 

 

 

 

CRC

Off

On

Bit Error Rate

1

Check the receive line and

 

 

 

exceeds the

 

external equipment.

 

 

 

predetermined

2

Replace the remote DTI card.

 

 

 

value

 

 

 

 

 

 

 

 

PCM

Off

On

No PCM signals

1

Check to see if the DTI cable is

 

 

 

arrive from the

 

correctly connected.

 

 

 

distant office

2

Plug and unplug the DTI card.

 

 

 

 

 

Repeat this two or three times.

 

 

 

 

 

 

FRM

Off

On

Frame Alignment

1

Check the receive line and

 

 

 

signals from the

 

external equipment.

 

 

 

distant office can-

2

Replace the remote DTI card.

 

 

 

not be received

 

 

 

 

 

 

 

 

RMT

Off

On

Frame Alignment

1

Check the transmission line

 

 

 

signals cannot be

 

and external equipment.

 

 

 

sent to the

2

Replace the DTI card.

 

 

 

remote PBX

 

 

 

 

 

 

 

 

AIS

Off

On

Remote PBX is in

1

Check the switch settings of

 

 

 

the loop-back test

 

the remote DTI card.

 

 

 

 

 

 

NEAX2000 IVS2 ISDN System Manual

Page 191

ND-70919 (E), Issue 1.0

Page 202
Image 202
NEC ND-70919 system manual LED LED Indication Fault Normal, Cause Action

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.