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       # MOTOROLA, INC.
       
          3261/3266
       
          Modem Type             Data (synchronous/asynchronous)         
          Maximum Data Rate      14.4Kbps                                
          Data Bus               External                                
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.32,        
                                 V.32bis                                 
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression                                         
                                 Motorola Codex                          
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose      | Location |     Purpose      | Location |
          |-------------------+----------+------------------+----------|
          | RETURN button     |   BT1    | Leased line out  |   CN3    |
          |-------------------+----------+------------------+----------|
          | DOWN button       |   BT2    | 120VAC power     |   CN4    |
          |-------------------+----------+------------------+----------|
          | ACROSS button     |   BT3    | RS-232/422       |   CN5    |
          |-------------------+----------+------------------+----------|
          | ENTER button      |   BT4    | Network control  |   CN6    |
          | (Talk/Data)       |          | out              |          |
          |-------------------+----------+------------------+----------|
          | Switched line out |   CN1    | Network control  |   CN7    |
          |                   |          | in               |          |
          |-------------------+----------+------------------+----------|
          | Line in           |   CN2    | Power switch     |   SW1    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               ELECTRICAL INTERFACE SELECTION               |
          |------------------------------------------------------------|
          | Interface                     |           SW2/1            |
          |-------------------------------+----------------------------|
          | » EIA/TIA 232-D               |             On             |
          |-------------------------------+----------------------------|
          | ITU-T V.35                    |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  TEST/BUSY OUT ON PIN 25                   |
          |------------------------------------------------------------|
          | Mode                                         |    SW2/2    |
          |----------------------------------------------+-------------|
          | » Enable busy out when pin 25 is high        |     Off     |
          |----------------------------------------------+-------------|
          | Self test is in progress when pin 25 is high |     On      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 FRONT PANEL CONFIGURATION                  |
          |------------------------------------------------------------|
          | Mode                          |           SW2/3            |
          |-------------------------------+----------------------------|
          | » Front panel enabled         |            Off             |
          |-------------------------------+----------------------------|
          | Front panel disabled          |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RESET MEMORY                        |
          |------------------------------------------------------------|
          | Mode                            |          SW2/4           |
          |---------------------------------+--------------------------|
          | » Normal operation              |           Off            |
          |---------------------------------+--------------------------|
          | Reset modem to factory settings |            On            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMMAND SETS                        |
          |------------------------------------------------------------|
          | Mode                          |           SW2/5            |
          |-------------------------------+----------------------------|
          | » Command sets enabled        |            Off             |
          |-------------------------------+----------------------------|
          | Command sets disabled         |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             FACTORY CONFIGURED - DO NOT ALTER              |
          |------------------------------------------------------------|
          |           Switch            |           Position           |
          |-----------------------------+------------------------------|
          |            SW2/6            |             Off              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  | Color | Status |             Condition             |
          |-------+-------+--------+-----------------------------------|
          |  RD   |  Red  |   On   |      Modem is receiving data      |
          |-------+-------+--------+-----------------------------------|
          |  RD   |  Red  |  Off   |    Modem is not receiving data    |
          |-------+-------+--------+-----------------------------------|
          |  TR   |  Red  |   On   |        DTR signal is high         |
          |-------+-------+--------+-----------------------------------|
          |  TR   |  Red  |  Off   |         DTR signal is low         |
          |-------+-------+--------+-----------------------------------|
          | RI/OH |  Red  |   On   |  Switched line is off-hook or is  |
          |       |       |        |              ringing              |
          |-------+-------+--------+-----------------------------------|
          | RI/OH |  Red  |  Off   |  Switched line is on-hook and is  |
          |       |       |        |            not ringing            |
          |-------+-------+--------+-----------------------------------|
          |  TD   |  Red  |   On   |    Modem is transmitting data     |
          |-------+-------+--------+-----------------------------------|
          |  TD   |  Red  |  Off   |  Modem is not transmitting data   |
          |-------+-------+--------+-----------------------------------|
          |  CD   |  Red  |   On   |      Carrier signal detected      |
          |-------+-------+--------+-----------------------------------|
          |  CD   |  Red  |  Off   |    Carrier signal not detected    |
          |-------+-------+--------+-----------------------------------|
          | RC/NC |  Red  |   On   | Modem is under remote or network  |
          |       |       |        |              control              |
          |-------+-------+--------+-----------------------------------|
          | RC/NC |  Red  |  Off   |   Modem is under local control    |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
                  See document V1280 for a full command summary.