Data communication Connectors

ISDN

           +---+
        +--+   +--+
    +---+         +---+
    |                 |
    | | | | | | | | | |
    | | | | | | | | | |
    +-^-^-^-^-^-^-^-^-+
      1 2 3 4 5 6 7 8
Pin   Signal

1     Unused
2     Unused
3     TXD   (+)  (+ PWR)
4     RXD   (+)  (- PWR)
5     RXD   (-)  (- PWR)
6     TXD   (-)  (+ PWR)
7     Power (-)  (opt)
8     Power (+)  (opt)
 -----+ +--------------- 3
      | |
      ) (
      ) (
      ) *-- + PWR
      ) (
      ) (
      | |
 -----+ +--------------- 6

 -----+ +--------------- 4
      | |
      ) (
      ) (
      ) *-- - PWR
      ) (
      ) (
      | |
 -----+ +--------------- 5

 - PWR ----------------- 7







 + PWR ----------------- 8

The 7 - 8 pair is for an optional additional power supply.

Midi

Solder side;

         2                     2
    4    *    5           5    o    4
      *     *               o     o
   1 *       * 3         3 o       o 1

  180 degree Din Male    180 degree Din Female

Pin side;

         2                     2
    5    *    4           4    o    5
      *     *               o     o
   3 *       * 1         1 o       o 3

Midi uses a 180 degree 5 pin Din plug. The cable is a shielded twisted pair. The shield is connected to pin 2 (the top pin) at both ends of the cable. The cable uses male plugs at both ends. The female has pin 2 to ground at the sending side, not at the receiving side.

1    nc
2    GND
3    nc
4    Midi
5    Midi

Transmit side


Din, send;

              +-----+
 + 5 V >------+ 220 +--> Din Pin 4
              +-----+

              +-----+
 Midi data >--+ 220 +--> Din Pin 5
              +-----+


 GND >-----------------> Din Pin 2

Receive side


                                       + 5 V
                                       \ /
                                        |
                                       +++
                                       | |
                                       +++
                                        |
              +-----+                   *---> Midi data
 Din Pin 4 >--+ 220 +---*-----+         |
              +-----+   |     |      | /
                      --+-- --+--    |/
                       /|\   \|/  -> |    Opto coupler
                      --+-- --+-- -> |\
                        |     |      |_\|
 Din Pin 5 >------------*-----+         |
                                        |
                                       \|/
                                       GND

RS 530

              1
        3 2 1 0 9 8 7 6 5 4 3 2 1
    ---------------------------------
     \  o o o o o o o o o o o o o  /
       \ o o o o o o o o o o o o /
         -----------------------
                   2
         5 4 3 2 1 0 9 8 7 6 5 4

               DB-25 Female
 1    Shield
 2    Transmitted Data (A)
 3    Received Data (A)
 4    Request To Send (A)
 5    Clear To Send (A)
 6    DCE Ready (A)
 7    Gnd
 8    Received Line Signal Detector (A)
 9    Receiver Signal Element Timing (B)
10    Received Line Signal Detector (B)
11    Ext. Transmit Signal Element Timing (B)
12    Transmit Signal Element Timing (B)
13    Clear To Send (B)

14    Transmitted Data (B)
15    Transmit Signal Element Timing (A)
16    Received Data (B)
17    Receiver Signal Element Timing (A)
18    Local Loopback
19    Request To Send (B)
20    DTE Ready (A)
21    Remote Loopback
22    DCE Ready (B)
23    DTE Ready (B)
24    Ext. Transmit Element Timing (A)
25    Test Mode

V24 / RS 232

9 Pins

        1 2 3 4 5
    -----------------
     \  * * * * *  /
       \ * * * * /
         -------
         6 7 8 9

        DE-9 Male
1     DCD               Data Carrier Detect
2     RXD               Received Data
3     TXD               Transmitted Data
4     DTR               Data Terminal Ready
5     GND               GrouND

6     DSR               Data Set Ready
7     RTS               Request To Send
8     CTS               Clear To Send
9     RI                Ring Indicator

25 Pins

                          1
        1 2 3 4 5 6 7 8 9 0 1 2 3
    ---------------------------------
     \  * * * * * * * * * * * * *  /
       \ * * * * * * * * * * * * /
         -----------------------
                     2
         4 5 6 7 8 9 0 1 2 3 4 5

                DB-25 Male
 1
 2    TXD               Transmitted Data
 3    RXD               Received Data
 4    RTS               Request To Send
 5    CTS               Clear To Send
 6    DSR               Data Set Ready
 7    GND               GrouND
 8    DCD               Data Carrier Detect
 9    TEST
10    TEST
11    STF               Select Transmit Frequency
12    SDCD              Secondary DCD
13    SCTS              Secondary CTS

14    STXD              Secondary TXD
15    TXC               DCE TX Clock
16    SRXD              Secondary RXD
17    RXC               RX Clock
18
19    SRTS              Secondary RTS
20    DTR               Data Terminal Ready
21    SQ                Signal Quality
22    RI                Ring Indicator
23    CH/CI             rate select
24    XTC               DTE TX Clock
25

Pin 1 used to be protective ground.
The shield should be connected (soldered) to the connector shell at both ends of the cable.

V35

                 ACEHKM
      ACEHKMPSUWYACEHKM

     -------------------
    |  * * * * * * * *  |
    | * * * * * * * * * |
    |  * * * * * * * *  |
    | * * * * * * * * * |
     -------------------
                 BDFJLN
      BDFJLNRTVXZBDFJLN
 A    Chassis Ground
 B    Signal Ground
 C    Request To Send
 D    Clear To Send
 E    Data Set Ready
 F    Data Carrier Detect
 H    Data Terminal Ready
 J    Ring Indicator
 K
 L
 M
 N
 P    Transmitted Data (A)
 R    Received Data (A)
 S    Transmitted Data (B)
 T    Received Data (B)
 U    Terminal Timing (A)
 V    Receive Timing (A)
 W    Terminal Timing (B)
 X    Receive Timing (B)
 Y    Transmit Timing (A)
 Z
AA    Transmit Timing (B)
BB
CC
DD
EE
FF
HH
JJ
KK
LL
MM
NN

V35 used to be modem standard; A 48 kbps data signal was ASK modulated on a 60 kHz carrier, the lower sideband suppressed, resulting in a 60 ... 108 kHz bandwidth. Somehow V35 is now used as a name for this connecter.

V36 / RS 449

                          1
        9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
    ---------------------------------------------
     \  o o o o o o o o o o o o o o o o o o o  /
       \ o o o o o o o o o o o o o o o o o o /
         -----------------------------------
                       3                   2
         7 6 5 4 3 2 1 0 9 8 7 6 5 5 3 2 1 0

                        DC-37
 1    Shield
 2    Signal Rate Indicator
 3
 4    Send Data (A)
 5    Send Timing (A)
 6    Receive Data (A)
 7    Request To Send (A)
 8    Receive Timing (A)
 9    Clear To Send (A)
10    Local Loopback
11    Data Mode (A)
12    Terminal Ready (A)
13    Receiver Ready (A)
14    Remote Loopback
15    Incoming Call
16    Select Frequency
17    Terminal Timing (A)
18    Test Mode
19    Signal Ground

20    Receive Common
21
22    Send Data (B)
23    Send Timing (B)
24    Received Data (B)
25    Request To Send (B)
26    Receive Timing (B)
27    Clear To Send (B)
28    Terminal In Service
29    Data Mode (B)
30    Terminal Ready (B)
31    Receiver Ready (B)
32    Select Standby
33    Signal Quality
34    New Signal
35    Terminal Timing (B)
36    Standby Indicator
37    Send Common

UTP

           +---+
        +--+   +--+
    +---+         +---+
    |                 |
    | | | | | | | | | |
    | | | | | | | | | |
    +-^-^-^-^-^-^-^-^-+
      1 2 3 4 5 6 7 8
Pin   Signal                            Wire colour

1     Output Data (+)                   White / Orange
2     Output Data (-)                   Orange
3     Input Data (+)                    White / Green
4     Reserved for Telephone use        Blue
5     Reserved for Telephone use        White / Blue
6     Input Data (-)                    Green
7     Reserved for Telephone use        White / Brown
8     Reserved for Telephone use        Brown

In case of STP / FTP the shield is connected to the connector shell.

Gbps ethernet uses all 4 pairs;

 
Pin   Signal    Wire colour

1     A+        White / Orange
2     A-        Orange
3     B+        White / Green
4     C+        Blue
5     C-        White / Blue
6     B-        Green
7     D+        White / Brown
8     D-        Brown

All pairs are birectional.

X21

        1 2 3 4 5 6 7 8
    -----------------------
     \  * * * * * * * *  /
       \ * * * * * * * /
         -------------
           1
         9 0 1 2 3 4 5

              DA-15
 1    Shield
 2    Transmit (A)
 3    Control (A)
 4    Receive (A)
 5    Indication (A)
 6    Signal Timing (A)
 7    Byte Timing (A) (optional)
 8    Gnd

 9    Transmit (B)
10    Control (B)
11    Receive (B)
12    Indication (B)
13    Signal Timing (B)
14    Byte Timing (B) (optional)
15