B & B ELECTRONICS
1140
| Card Type | Short Range Modem |
| Chip Set | Unidentified |
| I/O Options | 25-pin serial
port (RS-232) Network interface via ST or SMA connectors |
| Wiring Type | Fiber optic cable |
| Maximum Data Rate | 38.4Kbps |
| Data Bus | External |
| CONNECTIONS | |||
Function |
Label |
Function |
Label |
| DTE/DCE serial port (25-pin | CN1 |
Network interface via ST or SMA | CN3 |
| Network interface via ST or SMA | CN2 |
||
| USER CONFIGURABLE SETTINGS | |||
Setting |
Label |
Position |
|
| » | Modem is in asynchronous mode | SW1/7 |
On |
| Modem is in synchronous mode | SW1/7 |
Off |
|
| » | Carrier forced high | SW1/8 |
Off |
| Carrier controlled by RTS | SW1/8 |
On |
|
| » | Asynchronous tolerance range from -2.5% to +1% | SW2/3 |
Off |
| Asynchronous tolerance range from -2.5% to +2.3% | SW2/3 |
On |
|
| » | Factory configured – do not alter | SW2/6 |
Unidentified |
| » | Factory configured – do not alter | SW2/7 |
Unidentified |
| » | V.52/V.54 tests enabled | SW2/8 |
Off |
| V.52/V.54 tests enabled | SW2/8 |
On |
|
| DATA RATE | |||||
Setting |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
1200bps |
On |
On |
On |
On |
|
1800bps |
Off |
On |
On |
On |
|
2400bps |
On |
Off |
On |
On |
|
3600bps |
Off |
Off |
On |
On |
|
4800bps |
On |
On |
Off |
On |
|
7200bps |
Off |
On |
Off |
On |
|
| » | 9600bps |
On |
Off |
Off |
On |
14.4Kbps |
Off |
Off |
Off |
On |
|
19.2Kbps |
On |
On |
On |
Off |
|
28.8Kbps |
Off |
On |
On |
Off |
|
38.4Kbps |
On |
On |
Off |
Off |
|
57.6Kbps |
Off |
On |
Off |
Off |
|
| TRANSMIT CLOCK SOURCE | |||
Source |
SW1/5 |
SW1/6 |
|
| » | Transmit clock generated interanlly |
On |
On |
Transmit clock derived from terminal interface |
Off |
On |
|
Receive recover clock |
On |
Off |
|
| CHARACTER LENGTH | |||
Setting |
SW2/1 |
SW2/2 |
|
8 bits |
Off |
On |
|
9 bits |
On |
On |
|
| » | 10 bits | Off |
Off |
11 bits |
On |
Off |
|
| RTS/CTS DELAY | |||
Setting |
SW2/4 |
SW2/5 |
|
| » | 7ms delay | On |
On |
53ms |
Off |
On |
|
No delay |
On |
Off |
|
No delay |
Off |
Off |
|
| TEST PATTERN GENERATOR | ||
Function |
Label |
Position |
511 test pattern transmitted |
SW3 |
1 |
Normal operation. Test pattern not activated |
SW3 |
2 |
511/E test pattern transmitted (intentional errors inserted) |
SW3 |
3 |
| LOOPBACK TEST SELECTOR | ||
Function |
Label |
Position |
Activates local analog loopback |
SW4 |
1 |
Normal operation. Loopback not activated |
SW4 |
2 |
Remote digital loopback initiated |
SW4 |
3 |
| DIAGNOSTIC LED(S) | |||
LED |
Color |
Status |
Condition |
ER |
Red |
On |
Bit error likely in received signal or error detected in 511 or 511/E test pattern |
ER |
Red |
Off |
Error not detected |
TST |
Red |
On |
Device has been placed in test mode by local or remote user |
TST |
Red |
Off |
Device is not conducting a test. |