Internet PLC Forum

Hi,

Please tell me the cable config to connect a Tri PLC to a Enfora GSM modem.

Thanks

peterh_DK, thanks for you response.

In depth, the problem is the following :

I have a  T100MD+ with the rs232 functional (i probe with a V92 US Robotics Modem and is OK), this port is DCE and the rs232 of the Enfora is too DCE, then the type of cable its most be cross over, i probe with a lot of cable config, for example :

both port are 9 pin female.

Figure 11-1. Null modem cable with full status and handshaking (Aprobada por enfora)

                    Conector                                Conector
                    9 Pines                                 9 pines

Signal ground    5   ---------------    5    Signal ground
Receive data     2   ---------------    3    Transmit data
Transmit data   3    ---------------    2    Receive data
Ready to send   7   ---------------    8    Clear to send
Clear to send    8    ---------------    7    Ready to send
Data terminal ready    4  ----+----    1    Data carrier detect
                                            |
                                           +----    6    Data set ready
Data carrier detect    1    ----+----    4    Data terminal ready
                                            |
     Data set ready    6    -----+

or

Figure 11-2. Variation on null modem cable with full status and handshaking

      Signal ground ---------------------- Signal ground
       Receive data ---------------------- Transmit data
      Transmit data ---------------------- Receive data
      Ready to send ---------------------- Clear to send
      Clear to send ---------------------- Ready to send
Data terminal ready ----+----------------- Data carrier detect
                                    |
     Data set ready ----+
                                                     +---- Data set ready
                                                      |
Data carrier detect ----+------------+---- Data terminal ready

    Ring indication -- not connected

                          not connected -- Ring indication

or

2   ---   3
3   ---   2
4   ---   4 and 6
5   ---   5
            7 with 8
            8 with 7

or

2   ---   3
3   ---   2
4   ---   6
5   ---   5
6   ---   4

when send the AT command (ATZ for example) the modem not respond nothig (OK or ERROR nothing).

Please can you tell me the pinout config of the DB 15 port (then maybe i can make a association and build another type of cable).

One more thing, the configuration of PLC and modem port is :

Spped :  9600
Data Bits :     8
Parity : None
Stop Bits :    1
Flow Control :  None

Thanks very much