Black Box ME444A-R3, ME444AE-R3, ME445C-X.21, ME445C-35 Name Abbrev Circuit Type Rack Norm Nest PIN

Page 31

256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)

Table 4-3. Pinout of the RackNest 2/14’s DB25 connector

when ME445C-35 is installed.

SIGNAL

ITU-TSS

LEAD

DB25

M/34

NAME (ABBREV.)

CIRCUIT

TYPE

(RACK-

(NORM.

 

 

 

NEST)

V.35)

 

 

 

PIN

PIN

 

 

 

 

 

Frame (Protective) Ground (FGND)

101

 

1

A

 

 

 

 

 

Signal Ground (SGND)

102

 

7

B

 

 

 

 

 

Send Data (SD)

103

A

9

P

 

 

B

11

S

 

 

 

 

 

Receive Data (RD)

104

A

12

R

 

 

B

13

T

 

 

 

 

 

Request to Send (RTS)

105

 

4

C

 

 

 

 

 

Clear to Send (CTS)

106

 

5

D

 

 

 

 

 

Data Set Ready (DSR)

107

 

6

E

 

 

 

 

 

Data Terminal Ready (DTR)

108

 

20

H

 

 

 

 

 

Received Line Signal Detector (RLSD),

109

 

8

F

a.k.a. Carrier Detect (CD)

 

 

 

 

 

 

 

 

 

Serial Clock Transmit External (SCTE),

113

A

19

U

a.k.a. External Clock (EXTC)

 

B

16

W

 

 

 

 

 

Serial Clock Transmit (SCT),

114

A

14

Y

a.k.a. Transmit Clock (TC)

 

B

10

AA, a

 

 

 

 

 

Serial Clock Receive (SCR),

115

A

23

V

a.k.a. Receive Clock (RC)

 

B

22

X

 

 

 

 

 

Remote Digital Loopback (RL)

140

 

21

HH, h*

 

 

 

 

 

Local Analog Loopback (LL)

141

 

18

JJ, j*

 

 

 

 

 

Test Mode (TM)

142

 

25

KK, k*

 

 

 

 

 

*Black Box often assigns these signals to these M/34 pins, but your DTE might use different pins (if it supports these signals at all). Consult your DTE’s manual.

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Image 31
Contents Kbps Line Driver FCC and IC RFI Statements Safety Warnings Declaration of Conformity Kbps Line Driver V.35, RS-530, or NOM Statement Trademarks Used in this Manual Contents Flow Control None SpecificationsSpecifications Physical Description IntroductionFunctional Description Line driver block diagramModulation Timing Point-to-point application ApplicationsTail-circuit application Placement of the Standalone Version ConfigurationInstalling the Card Version in the RackNest 2/14 Description of the Racknest 2/14’S Power Supply User-configurable options Configuring the Standalone or Card VersionUser-configurable options Layout of the 256-kbps Line Driver circuit board Kbps Line Driver V.35, RS-530, or Installing the Standalone Version in 19-Inch Racks InstallationInstalling a single unit in a 19-inch rack Installing two units in a 19-inch rack Installing a card in the RackNest 2/14 Installing the 256-kbps Line Driver Rackmount Card VersionRackNest 2/14 illustrated Function Installation Kbps Line Driver V.35, RS-530, or Signal ITU-TSS Lead Name Abbrev Circuit Type Rack Norm Nest PIN Pinout of the V.35 standalone’s M/34 connector DB25 DA15 Connecting Data Cables Line Connection Installation Operation Controls and IndicatorsOperation Indicators Operating ProcedureBit-Error-Rate Tester Bert TroubleshootingLoop Tests Bert using loops Local Analog Loopback Modem Self-TestLocal analog loopback Remote Digital Loopback Remote digital loopback Local Digital LoopbackLocal digital loopback Calling Black BoxShipping and Packaging 19-AWG 22-AWG 24-AWG 26-AWG Kbps Miles Appendix Maximum DistancesCopyright 2004. Black Box Corporation. All rights reserved