Mocomtech CRS-300 EIA-232/422/V.35/LVDS DB-25F Connector CRS-320/340, Circuit No 232

CRS-300 1:10 Redundancy Switch	Revision 16
Connector Pinouts	MN/CRS300.IOM

6.2.2EIA-232/422/V.35/LVDS – DB-25F Connector (CRS-320/340)

TMI User Data Interface connector

Table 6-5indicates the pinout for the DB-25F TMI User Data Interface connector (RS232/422/V.35/LVDS): J1 on the CRS-320 (obsolete), and J2 on the CRS-340.

Table 6-5. EIA-232/422/V.35/LVDS Connector

Pin

Generic Signal Description

Direction

EIA-422/

V.35

EIA-

Circuit No.

RS 530

232

1

Shield

-

Shield

FG

AA

101

2

Transmit Data A

DTE to Modem

SD A

SD A

BA

103

3

Receive Data A

Modem to DTE

RD A

RD A

BB

104

7

Signal Ground

-

SG

SG

AB

102

8

Receiver Ready A

Modem to DTE

RR A

RLSD *

CF

109

9

Receive Clock B

Modem to DTE

RT B

SCR B

-

115

10

Receiver Ready B

Modem to DTE

RR

B

-

109

11

Transmit Clock B

DTE to Modem

TT B

SCTE B

-

113

12

Internal Transmit Clock B

Modem to DTE

ST B

SCT B

-

114

14

Transmit Data B

DTE to Modem

SD B

SD B

-

103

15

Internal Transmit Clock A

Modem to DTE

ST A

SCT A

DB

114

16

Receive Data B

Modem to DTE

RD B

RD B

-

104

17

Receive Clock A

Modem to DTE

RT A

SCR A

DD

115

23

External Carrier Off

DTE to Modem

-

-

-

-

(EIA-232 ‘1' or TTL ‘low’)

24

Transmit Clock A

DTE to Modem

TT A

SCTE A

DA

113

Notes:

1.Receiver-Ready is an EIA-232-level control signal on a V.35 interface.

2.DO NOT connect signals to pins which are not shown - these pins are reserved for use by the redundancy system.

3.'B' signal lines are not used for EIA-232 applications.

4.For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the modem is DTE, and ignore Transmit clocks if the modem is DCE.

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