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# 3COM CORPORATION
PASSWORD MODEM
Modem Type Data (synchronous/asynchronous)
Maximum Data Rate 1200bps
Data Bus External
Data Modulation Protocol Bell 103A/212A
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Line in | CN1 | RS-232/422 | CN3 |
|-----------------+----------+--------------------+----------|
| DC power | CN2 | Power switch | SW2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MULTILINE PHONE INSTALLATION |
|------------------------------------------------------------|
| Setting | J1 |
|-------------------------------+----------------------------|
| » Single line | Off |
|-------------------------------+----------------------------|
| Multiline | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CHARACTER LENGTH |
|------------------------------------------------------------|
| Setting | J2 |
|-------------------------------+----------------------------|
| » 10-bit | Off |
|-------------------------------+----------------------------|
| 11-bit | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMIT AND RECEIVE SIGNAL |
|------------------------------------------------------------|
| Setting | J3 | J4 |
|--------------------+-------------------+-------------------|
| » Normal pin | Pins 1 & 2 closed | Pins 1 & 2 closed |
| assignment | | |
|--------------------+-------------------+-------------------|
| Tx/Rx pins | Pins 2 & 3 closed | Pins 2 & 3 closed |
| reversed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ANLOG LOOPBACK TEST MODE |
|------------------------------------------------------------|
| Setting | J5 |
|----------------------------+-------------------------------|
| » On | Normal operation |
|----------------------------+-------------------------------|
| Off | Analog loopback mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO ANSWER |
|------------------------------------------------------------|
| Setting | SW1/1 |
|----------------------+-------------------------------------|
| » Off | Modem answers on first ring |
|----------------------+-------------------------------------|
| On | Modem does not answer on first ring |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARRIER DETECT |
|------------------------------------------------------------|
| Setting | SW1/2 |
|----------------------------+-------------------------------|
| » Off | CD normal |
|----------------------------+-------------------------------|
| On | CD forced high |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PBX MODE |
|------------------------------------------------------------|
| Setting | SW1/3 |
|-------------------------+----------------------------------|
| » Off | Normal dial up line equalization |
|-------------------------+----------------------------------|
| On | PBX operation |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR SIGNAL |
|------------------------------------------------------------|
| Setting | SW1/4 |
|----------------------------+-------------------------------|
| » Off | DTR normal |
|----------------------------+-------------------------------|
| On | DTR forced high |
+------------------------------------------------------------+