Power Supply - Nortel Circuit Card Installation Manual

Page 504 of 906

Power supply

EIA signals supported
Table 165
EIA signals supported (RS-232-C)
DB-25
EIA Pin
BA 2
BB 3
CB 5
CC 6
AB 7
CF 8
CD 20
CE 22
Note: RS-422 leads supported are: Tx (transmit) and Rx (receive).
553-3001-211 Standard 3.00
NT7D16 Data Access card
Be sure that all power requirements are met before installing the DAC.
Operation may be affected by improper power and environmental conditions.
The DAC supports a subset of the standard signals. Only 8 leads can be
brought through the backplane connector for each port, totaling 48 leads for
each card slot. Table 165 lists the EIA signals supported on this card.
Signal
abbreviation
TD
RD
CTS
DSR
GND
DCD
DTR
RI
August 2005
Description
Transmitted Data
Received Data
Clear To Send
Data Set Ready
Signal Ground
Carrier Detect
Data Terminal Ready
Ring Indicator
DCE DTE
mode mode
In Out
Out In
Out In
Out In
— —
Out In
In Out
Out In