Interfaces
Table D-4: Ports 3 and 4 Pin Functions
DB- |
|
| ||||
25 Pin |
|
|
|
|
|
|
EIA- | V.24 | Function | EIA- |
| Function | |
|
| |||||
| 232E | Pin |
| 366 |
|
|
| Pin |
|
| Pin |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 | AA | 101 | Frame Ground | Shield |
| Frame Ground |
|
|
| (FG) |
|
|
|
|
|
|
|
|
|
|
2 | BA | 103 | Transmitted Data | DPR |
| Digit Present |
|
|
| to UTA (TC) |
|
|
|
|
|
|
|
|
|
|
3 | BB | 104 | Received Data | ACR |
| Abandon Call and |
|
|
| from UTA (RD) |
|
| Retry |
|
|
|
|
|
|
|
4 | CA/CJ | 105 | Request to Send | CRQ |
| Call Request |
|
|
| (RTS) |
|
|
|
|
|
|
|
|
|
|
5 | CB | 106 | Clear to Send | PND |
| Present Next Digit |
|
|
| (CTS) |
|
|
|
|
|
|
|
|
|
|
6 | CC | 107 | Data Set Ready | PWI |
| Power Indication |
|
|
| (DSR) |
|
|
|
|
|
|
|
|
|
|
7 | AB | 102 | Signal Ground | SG |
| Signal Ground |
|
|
| (SG or GND) |
|
|
|
|
|
|
|
|
|
|
8 | CF | 109 | Data Carrier Detect | - |
| (Not Used) |
|
|
| (CD or DCD) |
|
|
|
|
|
|
|
|
|
|
9 | (Re- | + | (Not Connected) | - |
| (Not Connected) |
| served) |
|
|
|
|
|
|
|
|
|
|
|
|
10 | (Re- | + | (Not Connected) | - |
| (Not Connected) |
| served) |
|
|
|
|
|
|
|
|
|
|
|
|
11 | - | 126 | (Not Connected) | - |
| (Not Connected) |
|
|
|
|
|
|
|
12 | SCF/CI | 122/ | (Not Connected) | - |
| (Not Connected) |
|
| 112 |
|
|
|
|
|
|
|
|
|
|
|
13 | SCB | 121 | (Not Used) | DSC |
| Distant Station |
|
|
|
|
|
| Connected |
|
|
|
|
|
|
|
14 | SBA | 118 | (Not Used) | NB1 |
| Digit Lead 1 |
|
|
|
|
|
|
|
15 | DB | 114 | (Not Used) | NB2 |
| Digit Lead 2 |
|
|
|
|
|
|
|
16 | SBB | 119 | (Not Used) | NB4 |
| Digit Lead 3 |
|
|
|
|
|
|
|
17 | DD | 115 | (Not Used) | NB8 |
| Digit Lead 4 |
|
|
|
|
|
|
|
18 | LL | 141 | Local Loopback | - |
| DO NOT USE |
|
|
|
|
|
|
|
19 | SCA | 120 | (Not Connected) | - |
| (Not Connected) |
|
|
|
|
|
|
|
UTA220/UTA220k |
