Black Box ME251A-R3 Скачать руководство пользователя

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Order

toll-free

in the U.S.: Call

877-877-BBOX

(outside U.S. call

724-746-5500

)

FREE technical support 24 hours a day, 7 days a week: Call

724-746-5500

or fax

724-746-0746

Mailing address:

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site:

www.blackbox.com

• E-mail:

[email protected]

CUSTOMER

SUPPORT

INFORMATION

DECEMBER 2001

ME251A-R3

ME251AE-R3

ME251C-R3
ME253A-R2

ME253AE-R2

ME253C-R2
ME255A-R2

ME255AE-R2

ME255C-R2

Synchronous Modem

Eliminator (SME-4M)

SME-4

DSR TXD CTS

B B B

R I C O N

L B

CTS TXD DSR

A A

Содержание ME251A-R3

Страница 1: ...6 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com CUSTOMER SUPPORT INFORMATION DECEMBER 2001 ME251A R3 ME251AE R3 M...

Страница 2: ...erated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measure...

Страница 3: ...flujo de aire por los orificios de ventilaci n 10 El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amp...

Страница 4: ...TRADEMARK STATEMENT 3 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners...

Страница 5: ...iminator SME 4M 4 Contents Chapter Page 1 Specifications 5 2 Description 6 3 Installation 8 3 1 LED Displays 10 4 Digital Loopback Test 12 5 Application Notes 13 6 RS 232 Interface 14 7 Nonstandard Tr...

Страница 6: ...Unit 2 lb 0 9 kg Enclosure High impact plastic Connectors 2 DB25 female mounted on rear panel Interface RS 232C CCITT V 24 V 28 serial synchronous or asynchronous Indicators 6 LEDs TX Data CTS and DS...

Страница 7: ...and simplifies installation and replacement in the field Since no special tools are required the SME 4M unit is designed for o it yourself installation Six indicators and three front panel switches fa...

Страница 8: ...dicators and Straps CTS B TXD B DSR B LB CON RI DSR A TXD A CTS A AC PWR Y1 W7 DSR B REM LOC 50ms 10ms 0ms CTS B DELAY W3 50ms 10ms 0ms CTS B DELAY W4 U9 U7 U8 U10 U5 U2 W8 CD B ON SW W9 DSR A REM LOC...

Страница 9: ...ng mode by installing the speed selection strap W2 in Figure 2 3 to async or the desired synchronous speed as shown below For more information see Chapter 7 PART NUMBER SPEED STRAP POSITION ME251A R3...

Страница 10: ...raps In the remote position the DSR signal is generated when the other port receives a DTR signal In the local position DSR is always on 10 The CD Carrier Detect option is controlled by setting the A...

Страница 11: ...A to port B OFF no data flow from port A to port B DSR ON Data Set Ready signal ON OFF Data Set Ready signal OFF DSR A ON indicates a DSR signal pin 6 out from port A OFF indicates no DSR signal pin 6...

Страница 12: ...icates a CTS signal pin 5 out from port A OFF indicates no CTS signal pin 5 out from port A CTS B ON indicates a CTS signal pin 5 out from port B OFF indicates no CTS signal pin 5 out from port B NOTE...

Страница 13: ...1 Press the loopback switch the switch must remain in the IN position on the front panel to loopback at the digital interfaces for both devices connected to the SME 4M 2 Enter data at the terminal or...

Страница 14: ...DSR A Local CD B SW DSR B Local Set all front panel pushbuttons in the OUT position NOTE The IBM device parameters should be set for non switched leased line 4 With DSR A and B configured Remote the D...

Страница 15: ...lear To Send Control From DCE 6 CC Data Set Ready Control From DCE 7 AB Signal Ground Ground 8 CF Data Carrier Detect Control From DCE 9 DC Test Voltage 10 DC Test Voltage 11 Unassigned 12 SCF Seconda...

Страница 16: ...19 SCA Secondary Request Control To DCE To Send 20 CD Data Terminal Ready Control To DCE 21 CG Signal Quality Control From DCE Detector 22 CE Ring Indicator Control From DCE 23 CH Data Signal Rate Con...

Страница 17: ...22 23 24 25 PROTECTIVE GROUND TRANSMITTED DATA RECEIVED DATA REQUEST TO SEND CLEAR TO SEND DATA SET READY SIGNAL GROUND COMMON RETURN RECEIVED LINE SIGNAL DETECTOR VOLTAGE VOLTAGE SECONDARY RECEIVED...

Страница 18: ...set the SME 4M for one of these different speeds configure the unit according to the chart below Table 7 1 SME 4M Synchronous Transmission Speeds ME251 ME253 ME255 CRYSTAL 2 4576 MHz 1 792 MHz 2 048...

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