Nortel-networks Circuit Card Manual do Utilizador Página 402

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