Pin | Name | Description |
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1 | | |
2 | Digit Present (DPR) | A signal given to the ACE indicating that the digit lines contain a digit |
3 | Abandon Call and Retry (ACR) | An indicator signal from the ACE that it could not make a connection. Could be 'busy' |
4 | Call Request (CRQ) | A signal from the DTE that tells the ACE to go 'off hook' |
5 | Present Next Digit (PND) | A signal from the ACE to the DTE to indicate that the ACE is ready to receive the next digit |
6 | | |
7 | | |
8 | | |
9 | | |
10 | | |
11 | | |
12 | | |
13 | Distant Station Connected (DSC) | Indicator from ACE to DTE that the call is succesfully made |
14 | Digit Signal Circuits (NB1) | Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
15 | Digit Signal Circuits (NB2) | Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
16 | Digit Signal Circuits (NB3) | Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
17 | Digit Signal Circuits (NB4) | Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
18 | | |
19 | | |
20 | | |
21 | | |
22 | Data Line Occupied (DLO) | An indicator that is used by the ACE to let the DTE know that the line it wants to use is used by another device |
23 | | |
24 | | |
25 | | |