RACAL-DATACOM ============= VA-2450P, VA-2450S, VA-2450G, VA-2450K, VA-2455P, VA-2455S, VA-2455G, VA-2455K Card Type Modem (asynchronous) Chip Set Unidentified Maximum Data Rate 2400bps Data Bus External Data Modulation Protocol Unidentified +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Function | Label | Function | Label | |------------------------------------------------------------| | RS-232/422 | CN1 | Daughterboard | P4 | | | | header | | |--------------------------+---------+-----------------+-----| | DC power | CN2 | Daughterboard | P5 | | | | header | | |--------------------------+---------+-----------------+-----| | Line out | CN3 | Answer mode | SW3 | | | | switch | | |--------------------------+---------+-----------------+-----| | Header to main modem | J4 | Loopback test | SW4 | | board | | switch | | |--------------------------+---------+-----------------+-----| | Header to main modem | J5 | | | | board | | | | |------------------------------------------------------------| | Note: Daughterboard included on VA-2455 models only. | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Setting | Label | Position | |-----------------------------------------+-------+----------| | Carrier receive level set at 0dBm to | SWA/1 | On | | -35dBm (switched-line) | | | |-----------------------------------------+-------+----------| | Carrier receive level set at -10dBm to | SWA/1 | Off | | -45dBm (leased-line) | | | |-----------------------------------------+-------+----------| | i Phase equalization disabled | SWA/2 | Off | |-----------------------------------------+-------+----------| | Phase equalization enabled | SWA/2 | On | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | SWA/3 | N/A | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | SWA/4 | N/A | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | SWB/1 | N/A | |-----------------------------------------+-------+----------| | i New synchronization pulse generation | SWB/2 | Off | | disabled | | | |-----------------------------------------+-------+----------| | New synchronization pulse generation | SWB/2 | On | | enabled | | | |-----------------------------------------+-------+----------| | i Modem uses internal clock source | SWB/3 | On | |-----------------------------------------+-------+----------| | Modem uses external clock source | SWB/3 | Off | |-----------------------------------------+-------+----------| | DTR normal | SWB/4 | Off | |-----------------------------------------+-------+----------| | DTR forced high | SWB/4 | On | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS (CON'T) | |------------------------------------------------------------| | Setting | Label | Position | |-----------------------------------------+-------+----------| | i Transmit clock separated from receive | SWB/5 | Off | | clock | | | |-----------------------------------------+-------+----------| | Receive clock looped through to | SWB/5 | On | | transmit clock | | | |-----------------------------------------+-------+----------| | i DSR forced low when modem is in test | SWB/6 | Off | | mode | | | |-----------------------------------------+-------+----------| | DSR normal when modem is in test mode | SWB/6 | On | |-----------------------------------------+-------+----------| | i RTS normal | SWB/7 | Off | |-----------------------------------------+-------+----------| | RTS forced high | SWB/7 | On | |-----------------------------------------+-------+----------| | i 50ms delay from carrier signal to | SWC/1 | On | | raise DCD | | | |-----------------------------------------+-------+----------| | 10ms delay from carrier signal to raise | SWC/1 | Off | | DCD | | | |-----------------------------------------+-------+----------| | i 275ms delay from answer tone to RTS | SWC/2 | Off | | disabled | | | |-----------------------------------------+-------+----------| | 275ms delay from answer tone to RTS | SWC/2 | On | | enabled | | | |-----------------------------------------+-------+----------| | i 160ms delay from CTS to RTS | SWC/3 | On | |-----------------------------------------+-------+----------| | 7.1ms delay from CTS to RTS | SWC/3 | Off | |-----------------------------------------+-------+----------| | i Local echo disabled | SWC/4 | Off | |-----------------------------------------+-------+----------| | Local echo enabled | SWC/4 | On | |-----------------------------------------+-------+----------| | i 105ms transmit to receive delay | SWC/5 | On | | enabled | | | |-----------------------------------------+-------+----------| | 105ms transmit to receive delay | SWC/5 | Off | | disabled | | | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | SWC/6 | N/A | |-----------------------------------------+-------+----------| | i Modem will pick up the line only when | SWC/7 | Off | | handset is off-hook | | | |-----------------------------------------+-------+----------| | Modem will pick up the line only when | SWC/7 | On | | handset is on-hook | | | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JA | N/A | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JB | N/A | |-----------------------------------------+-------+----------| | Modem will disconnect on reversal of | JD | Open | | line current | | | |-----------------------------------------+-------+----------| | Modem will not disconnect on reversal | JD | Closed | | of line current | | | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JE | Open | |-----------------------------------------+-------+----------| | i Signal ground not connected to | JF | Open | | chassis ground | | | |-----------------------------------------+-------+----------| | Signal ground connected to chassis | JF | Closed | | ground | | | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JG | N/A | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JH | Open | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JI | N/A | |-----------------------------------------+-------+----------| | i Analog loopback and busy out controls | JJ | Closed | | on pins 18 and 25 disabled | | | |-----------------------------------------+-------+----------| | Analog loopback and busy out controls | JJ | Open | | on pins 18 and 25 enabled | | | |-----------------------------------------+-------+----------| | i Pin 18 or 25 controls busy out only | JK | Open | |-----------------------------------------+-------+----------| | Pin 18 or 25 controls analog loopback | JK | Closed | | test and busy out | | | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JL | N/A | |-----------------------------------------+-------+----------| | i Receive clock follows transmit clock | JM | Open | | when no carrier signal is present | | | |-----------------------------------------+-------+----------| | Receive clock forced high when no | JM | Closed | | carrier signal is present | | | |-----------------------------------------+-------+----------| | i SW3 functions enabled | JP | Closed | |-----------------------------------------+-------+----------| | SW3 functions disabled | JP | Open | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JO | N/A | |-----------------------------------------+-------+----------| | i Factory configured - do not alter | JQ | N/A | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS (CON'T) | |------------------------------------------------------------| | Setting | Label | Position | |---------------------------------------+--------+-----------| | i CTS normal | JR | Open | |---------------------------------------+--------+-----------| | CTS follows RTS | JR | Closed | |---------------------------------------+--------+-----------| | i Auto-answer enabled | JS | Open | |---------------------------------------+--------+-----------| | Auto-answer disabled | JS | Closed | |---------------------------------------+--------+-----------| | Signal receive level set at | SW1B/1 | On | | switched-line levels | | | |---------------------------------------+--------+-----------| | Signal receive level set at | SW1B/1 | Off | | leased-line levels | | | |---------------------------------------+--------+-----------| | i Secondary channel transmission | SW1B/2 | Off | | attenuation set to -5dBm | | | |---------------------------------------+--------+-----------| | Secondary channel transmission | SW1B/2 | On | | attenuation set to 0dBm | | | |---------------------------------------+--------+-----------| | i Secondary channel local echo | SW1B/3 | On | | disabled | | | |---------------------------------------+--------+-----------| | Secondary channel local echo enabled | SW1B/3 | Off | |---------------------------------------+--------+-----------| | i Secondary channel data rate set to | SW1B/4 | On | | 150bps | | | |---------------------------------------+--------+-----------| | Secondary channel data rate set to | SW1B/4 | Off | | 75bps | | | |---------------------------------------+--------+-----------| | i Analog loopback test and/or busy | W1 | Pins 2 & | | out controlled by pin 25 | | 3 closed | |---------------------------------------+--------+-----------| | Analog loopback test and/or busy out | W1 | Pins 1 & | | controlled by pin 18 | | 2 closed | |---------------------------------------+--------+-----------| | Hardware configuration is used | W2 | Pins 2 & | | | | 3 closed | |---------------------------------------+--------+-----------| | Factory configuration is used | W2 | Pins 1 & | | | | 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | LINE TYPE | |------------------------------------------------------------| | Setting | JC | JN | |--------------------+-------------------+-------------------| | Switched line | Closed | Open | |--------------------+-------------------+-------------------| | 2-wire leased line | Closed | Closed | |--------------------+-------------------+-------------------| | 4-wire leased line | Open | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | TRANSMISSION LEVEL | |------------------------------------------------------------| | Setting | W3 | |-------------------------------+----------------------------| | Permissive (-10dBm) | Pins 1 & 2 closed | |-------------------------------+----------------------------| | Leased-line (0dBm) | Pins 2 & 3 closed | |-------------------------------+----------------------------| | Programmable | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAGNOSTIC LED(S) | |------------------------------------------------------------| | LED | Color | Status | Condition | |------+-------+----------+----------------------------------| | TXD | Red | On | Modem is transmitting data | |------+-------+----------+----------------------------------| | TXD | Red | Off | Modem is not transmitting data | |------+-------+----------+----------------------------------| | RXD | Red | On | Modem is receiving data | |------+-------+----------+----------------------------------| | RXD | Red | Off | Modem is not receiving data | |------+-------+----------+----------------------------------| | RTS | Red | On | RTS signal is high | |------+-------+----------+----------------------------------| | RTS | Red | Off | RTS signal is low | |------+-------+----------+----------------------------------| | CTS | Red | On | CTS signal is high | |------+-------+----------+----------------------------------| | CTS | Red | Off | CTS signal is low | |------+-------+----------+----------------------------------| | DSR | Red | On | DSR signal is high | |------+-------+----------+----------------------------------| | DSR | Red | Off | DSR signal is low | |------+-------+----------+----------------------------------| | DTR | Red | On | DTR signal is high | |------+-------+----------+----------------------------------| | DTR | Red | Off | DTR signal is low | |------+-------+----------+----------------------------------| | RI | Red | Blinking | Phone is ringing | |------+-------+----------+----------------------------------| | RI | Red | Off | Phone is not ringing | |------+-------+----------+----------------------------------| | CXR | Red | On | Carrier signal detected | |------+-------+----------+----------------------------------| | CXR | Red | Off | Carrier signal not detected | +------------------------------------------------------------+ +------------------------------------------------------------+ | MISCELLANEOUS TECHNICAL NOTES | |------------------------------------------------------------| | The -S and -P models are permissive and programmable | | switched line modems, respectively. The -G and -K models | | are 2-wire and 4-wire leased line modems, respectively. | | The defaults for the jumpers reflect these differences | | where applicable. | +------------------------------------------------------------+