B & B ELECTRONICS
2400/CM
| Card Type | CSU/DSU |
| Chip Set | Unidentified |
| I/O Options | 34-pin V.35 interface, Power network interface via RJ-48. |
| Maximum Data Rate | 64Kbps |
| Data Bus | External |
| CONNECTIONS | |||
| Function | Label | Function | Label |
| 34-pin V.35 interface | CN1 | Power connector | CN3 |
| Network interface via RJ-48 connector | CN2 | ||
| USER CONFIGURABLE SETTINGS | |||
| Setting | Label | Position | |
| Unit is powered from DTE interface | JP1 | Pins 1 | |
| Normal power enabled | JP1 | Pins 3 | |
| » | Transmitter and CTS will operate separate from receiver state | SW1/3 | Off |
| CTS will go low if receiver is in no signal state or CD is low | SW1/3 | On | |
| » | RTS forced high | SW1/4 | On |
| RTS follows DTE | SW1/4 | Off | |
| » | 56Kbps | SW1/5 | Off |
| 64Kbps | SW1/5 | On | |
| » | Front panel switches enabled | SW1/6 | Off |
| Front panel switches disabled | SW1/6 | On | |
| » | DTE loopback switches enabled | SW1/7 | Off |
| DTE loopback switches disabled | SW1/7 | On | |
| » | Unit will respond to remote loopback requests | SW1/8 | Off |
| Unit will not respond to remote loopback requests | SW1/8 | On | |
| TRANSMIT CLOCK SOURCE | |||
| Source | SW1/1 | SW1/2 | |
| » | Transmit clock derived from receive line signal for DDS operation |
Off | On |
| Transmit clock derived from receive line signal. Remote device may initiate V.54 loopback. For use only in campus short-haul configuration | On | On | |
| Transmit clock derived from terminal interface | On | Off | |
| Transmit clock generated internally | Off | Off | |
| LOOPBACK TEST SELECTOR | ||
| Function | Label | Position |
| Remote digital loopback initiated | SW3 | 1 |
| Normal operation. Loopback not activated | SW3 | 2 |
| Activates local analog loopback | SW3 | 3 |
| TEST PATTERN GENERATOR | ||
| Function | Label | Position |
| 511/E test pattern transmitted (intentional errors inserted) | SW4 | 1 |
| Normal operation. Test pattern not activiated | SW4 | 2 |
| 511 test pattern transmitted | SW4 | 3 |
| DIAGNOSTIC LED(S) | |||
| LED | Color | Status | Condition |
| PWR | Green | On | Power is on |
| PWR | Green | Off | Power is off |
| TD | Red | On | CSU/DSU detecting zero on transmit data |
| TD | Red | Off | CSU/DSU not detecting zero on transmit data. Idle condition or one data detected |
| CD | Red | On | Carrier signal high |
| CD | Red | Off | Carrier signal low |
| BERT | Red | On | Bit error likely likely in received signal or error detected in 511 or 511/E test pattern |
| BERT | Red | Off | Error not detected |
| LOOP | Red | On | Device has been placed on LAL or RDL test mode by local or remote user |
| LOOP | Red | Off | Device is not conducting a test |
| RD | Green | On | C SU/DSU detecting zero on receive data |
| RD | Green | Off | CSU/DSU not detecting zero on receive data. Idel condition or one data detected |
| NS | Green | On | No valid carrier signal detected |
| NS | Green | Off | Valid carrier signal detected |