User's Manual

CHAPTER 4: Installation

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

ME445C-530 is installed or RS-530 standalone’s DB25 connector.

SIGNAL ITU-TSS LEAD DB25

NAME (ABBREV.) CIRCUIT TYPE PIN

Shield (SHD) 101 1

Signal Ground (SGND) 102 7

Transmitted Data (TD) 103 A 2

B14

Received Data (RD) 104 A 3

B16

Request to Send (RTS) 105 A 4

B19

Clear to Send (CTS) 106 A 5

B13

DCE Ready (DCR) 107 A 6

a.k.a. Data Set Ready (DSR) B 22

Data Terminal Ready (DTR) 108 A 20

B23

Received Line Signal Detector (RLSD), 109 A 8

a.k.a. Carrier Detect (CD) B 10

Transmitter Sig. Elem. Timing (DTE Source) 113 A 24

(TSETT), a.k.a. External Clock (EXTC) B 11

Transmitter Sig. Elem. Timing (DCE Source) 114 A 15

(TSETC), a.k.a. Transmit Clock (TC) B 12

Receiver Sig. Elem. Timing (DCE Source) 115 A 23

(RSETC), a.k.a. Receive Clock (RC) B 22

Remote Loopback (RL) 140 21

Local Loopback (LL) 141 18

Test Mode (TM) 142 25