B&B ELECTRONICS
1140 (v.54 MODEM) ST
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Card Type |
Transceiver |
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NIC Type |
Unidentified |
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Boot ROM |
Not available |
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Network Transfer Rate |
57.6Kbps |
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Topology |
Peer-Peer |
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Wiring Type |
Fiber optic cable |
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Data Bus |
External |
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CONNECTIONS |
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Function |
Label |
Function |
Label |
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Fiber Optic Connector (ST) |
CN1 |
RS-232 (DCE or DTE) |
CN3 |
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Fiber Optic Connector (ST) |
CN2 |
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USER CONFIGURABLE SETTINGS |
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Function |
Label |
Position |
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| » |
Asynchronous mode |
SW1/7 |
On |
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Synchronous mode |
SW1/7 |
Off |
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| » |
Carrier control constantly on |
SW1/8 |
Off |
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Carrier control controlled by RTS |
SW1/8 |
On |
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| » |
Extended Signaling Rate set to -2.5% to +1% Basic |
SW2/3 |
Off |
|
Extended Signaling Rate set to -2.5% to +2.3% Extended |
SW2/3 |
On |
|
| » |
Factory configured - do not alter |
SW2/6 |
Unidentified |
| » |
Factory configured - do not alter |
SW2/7 |
Unidentified |
| » |
V.54 Loopback test enable |
SW2/8 |
Off |
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V.54 Loopback test disable |
SW2/8 |
On |
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Local analog Loopback (LAL) test |
SW3 |
Up |
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Remote digital Loopback (RDL) test |
SW3 |
Down |
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V.54 bit error rate (BER) test, transmit "511" test pattern |
SW4 |
Up |
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V.54 bit error rate (BER) test, transmit "511/E" test pattern (with errors) |
SW4 |
Down |
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NETWORK SPEED SELECTION |
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Speed |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
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1.2Kbps |
On |
On |
On |
On |
|
|
1.8Kbps |
Off |
On |
On |
On |
|
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2.4Kbps |
On |
Off |
On |
On |
|
|
3.6Kbps |
Off |
Off |
On |
On |
|
|
4.8Kbps |
On |
On |
Off |
On |
|
|
7.2Kbps |
Off |
On |
Off |
On |
|
| » |
9.6Kbps |
On |
Off |
Off |
On |
|
14.4Kbps |
Off |
Off |
Off |
On |
|
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19.2Kbps |
On |
On |
On |
Off |
|
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28.8Kbps |
Off |
On |
On |
Off |
|
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38.4Kbps |
On |
On |
Off |
Off |
|
|
57.6Kbps |
Off |
On |
Off |
Off |
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CLOCK SOURCE |
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Setting |
SW1/5 |
SW1/6 |
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| » |
Internal transmit clock |
On |
On |
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Receive recover clock |
Off |
On |
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External transmit clock |
On |
Off |
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WORD LENGTH |
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Setting |
SW2/1 |
SW2/2 |
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8 bits |
Off |
On |
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9 bits |
On |
On |
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| » |
10 bits |
Off |
Off |
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11 bits |
On |
Off |
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RTS/CTS DELAY |
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Setting |
SW2/4 |
SW2/5 |
|
| » |
7 ms |
On |
On |
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53 ms |
Off |
On |
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No delay |
On |
Off |
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No delay |
Off |
Off |
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DIAGNOSTIC LED(S) |
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LED |
Color |
Status |
Condition |
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LED1 |
Red |
Blinking |
Errors are present during "511" test |
|
LED1 |
Red |
Off |
No errors are present during "511" test |
|
LED1 |
Red |
On |
"511/E" test is successful |
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LED2 |
Unidentified |
On |
LAL test activated |
|
LED2 |
Unidentified |
Off |
LAL test not activated |
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MISCELLANEOUS TECHNICAL NOTES |
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NOTE: Model 1140 is available with either male or female DB-25 connector. Model 1140 is available with either SMA or ST fiber optic connectors. NOTE: Model 1140 is designed to work in pairs. |