Motorola V3229 Operating Instructions - Page 13

Introdu Installation Table 1: Pi EIA- CCI Signal Name n 232D TT N V.24 o. Description 1 101 Shield Protective Ground 2 BA 103 Transmitted Serial digital data (to be modulated) Data from a data terminal or other digital data source: Synchronous data must be accompanied by the modem transmit clock (pin 15) or by an exter- nal data rate clock (pin 24). Data transitions should occur on negative- going clock transitions; asynchro- nous 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) with negative-going transitions on the data transition. Async data does not require a receive clock. 4 CA 105 Request to A positive level to the modem when Send 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 oper- ate. In dial-up operation, the modem must be off hook to give a high DSR signal.* 7 AB 102 Signal Ground Common signal and DC power or Common ground Return 8 CF 109 Received Line A positive level from the modem indi- Signal Detector cating the presence of a received sig- nal (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. -6 V.3229 / V.3229L