Nortel Circuit Card Installation Manual page 402

Page 402 of 906
Implementation guidelines
553-3001-211 Standard 3.00
NT6D80 MSDL card
supported circuit type. It also indicates whether the signal originates at the
DTE or DCE device.
Table 151
RS-422 interface pin assignments
Pin Signal Name
1 Frame Ground (FG)
2 Transmit Data (TXa)
3 Receive Data (RXa)
4 Request to Send (RTS)
5 Clear to Send (CTS)
7 Signal Ground (SG)
8 Receive Ready (RR)
12 Receive Signal Timing (RST)
13 Transmit Data (TXb)
14 Transmit Signal Timing (TSTb)
15 Transmit Signal Timing (TSTa)
16 Receive Data (RXb)
17 Receive Signal Timing (RSTa)
20 Data Terminal Ready (DTR)
23 Terminal Timing (TTa)
24 Terminal Timing (TTb)
The following are guidelines for engineering and managing MSDL cards:
• An MSDL can be installed in any empty network card slot.
August 2005
EIA
Circuit DTE
AA —
BAa X
BBa
CA X
CB
AB —
CF
DDb
BAb
DBb
DBa
BBb
DDa
CD X
DAb X
DAa X
DCE
—
X
X
—
X
X
X
X
X
X
X