Motorola V.3600, Руководство пользователя

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Installation
2-4 V.3600
Table 2-1. Pin Signal Descriptions
Pin
EIA-
232D CCITT
V.24
Signal Description
1 101 Shield No connection
2 BA 103 Transmit-
ted Data Serial digital data (to be modulated)
from a data terminal or other digital
data source: Synchronous data must be
accompanied by the modem transmit
clock (pin 15) or by an external data
rate clock (pin 24). Data transitions
should occur on positive-going clock
transitions; asynchronous data does not
require a transmit clock.
3 BB 104 Received
Data Serial digital data output to the DTE
interface: Sync data is accompanied by
an internal data rate (receive) clock
(pin 17) that has positive-going
transitions on the data transition. Async
data does not require a receive clock.
4 CA 105 Request to
Send A positive level to the modem when
data transmission is desired
5 CB 106 Clear to
Send A positive level from the modem in
response to Request to Send and when
the modem is ready to transmit. *
6 CC 107 Data Set
Ready A positive level from the modem when
power is on and ready to operate: In
dial-up operation, the modem must be
off hook to give a high DSR signal.*
7 AB 102 Signal
Ground Signal or common signal and dc power
ground. **
8 CF 109 Received
Line
Signal
Detector A positive level from the modem
indicating the presence of a received
signal (carrier detect). *
9 -- +12 Volts +12 voltage reference
10 -- -12 Volts -12 voltage reference
* Modem options may force these signals on or cause them to be ignored.
** Refer to Appendix C, Hardware Options.
† This function can be disabled or its logic sense reversed by hardware straps.